CONTENTS

About This Report 01

Message from the Chairman 03 01 02 03

About Us 04 Advancing Steady Progress Realizing Sustainable Shaping a Prosperous Future

Grounded on Strong Development Rooted in Centered around Social

Company Profile 04 Governance Environmental Protection Contribution

Corporate Development and ESG Milestones 05

Corporate Governance 19 Environmental Compliance Management* 39 Innovation-Driven Development* 85

Performance in 2024 07

Compliance Risk Control 22 Energy Utilization 49 Product and Service Safety and Quality* 96

Honorary Performance 09

Investor Relations Management 27 Water Resource Utilization 53 Data Security and Customer Privacy Protection 107

ESG Management 12

Anti-Commercial Bribery and Anti-Corruption 30 Pollutant Emissions 54 Supply Chain Due Diligence* 111

Party Building 33 Waste Disposal 58 Employees 115

Addressing Climate Change 66 Social Contribution 131

Indexes 138

Circular Economy 69 Rural Revitalization 133

Independent Assurance Statement 143

Ecosystem and Biodiversity Conservation 70 Industry Co-construction 134

Reader Feedback Form 145

*:Topics of Double MaterialityYunnan Tin Company Limited 2024 Sustainability Report

About This Report

This is the 17th Environmental Social and Governance (ESG) Report issued by Yunnan Tin Co. Ltd. ("the Company"). Wenshan Zinc Indium Smelting Co. Ltd. of Yunnan Tin Co. Ltd. (hereinafter referred to as"Wenshan Zinc Indium")

To help shareholders creditors partners employees and other stakeholders gain an in-depth understanding of Yunnan Tin New Materials Co. Ltd. (hereinafter referred to as "Yunnan Tin New Materials Co. Ltd.")

the Company's responsibilities and practices this report provides a disclosure of the Company's development

Chenzhou Yunxiang Mining and Metallurgy Co. Ltd. (hereinafter referred to as "Yunxiang Mining and Metallurgy")

practices and key achievements in environmental social and corporate governance as well as the fulfilment of other

responsibilities in 2024.Basis for Compilation

Reporting Period

Shenzhen Stock Exchange Self-Regulatory Guidelines No. 17 for Companies Listed on Shenzhen Stock Exchange—

This report covers the period from January 1 2024 to December 31 2024. To improve the comparability and Sustainability Report (for Trial Implementation) (hereinafter referred to as the "Guidelines")

perspectiveness some sections of this report may extend appropriately beyond this Reporting Period. Shenzhen Stock Exchange Self-Regulatory Guidance No. 3 for Companies Listed on Shenzhen Stock Exchange—

Preparation of Sustainability Report

Sustainable Development Goals (SDGs) of the United Nations

Reporting Boundary Sustainability Reporting Standards (GRI Standards) of the Global Sustainability Standards Board

China National Institute of Standardization (CNIS) Guidance on Social Responsibility Reporting (GB/T36001-2015)

The report discloses information on the fulfillment of corporate governance social and environmental responsibilities by Yunnan

Tin Co. Ltd. and its branches and subsidiaries and the relevant typical cases are sourced from the Company’s affiliates. International Organization for Standardization (ISO) ISO 26000: Guidance on Social Responsibility (2010)

Information Source Assurance of Report Reliability

The information disclosed in this report is obtained from the internal official documents statistical reports and annual The Company guarantees that the content of this report is true accurate and complete without any false records

reports of Yunnan Tin Co. Ltd. Data sources used in this report include public data from government agencies the misleading statements or material omissions.actual operational data annual financial data internal statistical reports of Yunnan Tin Co. Ltd. third-party question-

naire surveys third-party evaluations or interviews etc. The financial data in this report is expressed in RMB. For any

discrepancy between this report and the financial statements the financial statements shall prevail. Access to this Report

This report is available in electronic form on the Company’s official website (http://www.ytl.com.cn/) If you have any

Report Terminology questions or suggestions regarding this report please email to xygfzqb@ynxy.wecom.work or call 0871-66287901.Yunnan Tin Co. Ltd. (hereinafter referred to as "Yunnan Tin" "the Company" or "We")

Datun Tin Mine Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Datun Tin Mine")

Special Notice

Laochang Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Laochang Branch")

Kafang Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Kafang Branch") This report is available in both Chinese and English. In case of any discrepancy between the two versions the Chinese

version shall prevail.Tin Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Tin Branch")

Copper Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Copper Branch")

Yunnan Hualian Zinc Indium Co. Ltd. (hereinafter referred to as "Hualian Zinc Indium")

01 02Yunnan Tin Company Limited 2024 Sustainability Report

Message from the Chairman About Us

In 2024 the global economic landscape remained complex and dynamic presenting a range of challenges for the

non-ferrous metals sector. Nevertheless Yunnan Tin has stayed true to its original intention and steadfastly pursued Company Profile

sustainable development. This year we made significant strides and garnered valuable experience in advancing our

environmental social and corporate governance (ESG).Yunnan Tin Co. Ltd. (hereinafter referred to as "Yunnan Tin" or "the Company") is a state-owned listed company

In corporate governance we consistently prioritized high-quality development optimized our governance framework controlled by Yunnan Tin Group (Holding) Co. Ltd. In 1998 with the approval of the Yunnan Provincial People's

strengthened compliance and risk management and enhanced the transparency and quality of information disclosure. Government (Document No.: Yun Zheng Fu [1998] No. 99) the Company was established by the Yunnan Tin Company

Recognizing that good corporate governance is fundamental to the sustainable development of an enterprise we Gejiu Xidu Nonferrous Metal Processing Factory Gejiu Yinguan Tin Arts and Crafts Factory Gejiu Tin Resources

continuously improved the decision-making framework comprising the General Meeting of Shareholders the Board of Industrial Company and Gejiu Juyuan Industrial and Mining Company as sponsors.Directors the Board of Supervisors the Party Committee and the Senior Management standardized the implementation

of the internal governance system and ensured a scientific and transparent decision-making process. In addition we In October 1999 Yunnan Tin issued 130 million ordinary shares to the public for the first time with the approval of the

attached great importance to communication and interaction with investors. Through high-quality performance briefings China Securities Regulatory Commission. In February 2000 the Company was listed on the Shenzhen Stock Exchange

active response to investor concerns and great efforts to enhance the Company's investment value we made contribution (stock name: "Yunnan Tin"; stock code: 000960) and became the only A-share listed company with a complete tin

to the healthy development of the capital market. industry chain.In environmental management we adhered to the philosophy of green development actively responded to the national The Company has an integrated industrial structure that spans the entire supply chain of exploration mining

strategy of carbon peaking and carbon neutrality and made every effort to build a new pattern of green development. dressing and smelting of non-ferrous metals such as tin indium zinc and copper with its reserves of tin and indium

In 2024 we achieved significant results in energy conservation emission reduction resource recycling and ecological resources ranking first in the world. As a leading enterprise in the world's tin industry the Company has the largest

restoration. By optimizing production processes and promoting advanced energy conservation technologies we achieved tin production and processing base in China and the longest and most complete tin industry chain in the world and

steady improvements in energy efficiency. Through enhanced recycling of water resources and stringent controls of represents the leading level of the world's tin industry.pollutant emission we actively protected the ecological environment. Our efforts in tailings pond management and

mining ecological restoration have contributed positively to biodiversity conservation. We believe that environmental The Company's main products are tin ingots cathode copper zinc ingots die-casting zinc

protection is fundamental to productivity and that environmental improvement drives sustainable growth. Moving alloy and indium ingots. Yunnan Tin New Materials a significant holding enterprise of the

forward we will continue to increase our investment in environmental protection advance the development of green Company offers products such as tin materials and tin chemicals. It has a production capacity

mines and make unremitting efforts to realize the synergy between the economy and the environment. of 80 kt/a for tin smelting 125 kt/a for cathode copper 100 kt/a for zinc smelting 50 kt/a

for die-casting zinc alloy and 60 t/a for indium smelting. Yunnan Tin New Materials also has

In social responsibility we always adhered to innovation-driven development and constantly improved the quality a production capacity of 43 kt/a for tin materials and 27.1 kt/a for tin chemicals. The "YT"

of products and services to protect the rights and interests of customers. We prioritized employee development and trademark registered in the London Metal Exchange is an internationally renowned brand. The

created a good working environment that helps employees achieve personal value and professional growth. Furthermore sales volume of "YT" tin products has consistently ranked first in the world since 2005.we actively engaged in social welfare undertakings with a focus on areas such as education healthcare and rural

revitalization aiming to create more value for society. We deeply understand that the success of an enterprise is driven

by not only the creation of economic value but also its contribution to social welfare. We will uphold responsibility and

collaborate with all stakeholders making greater contributions to the future of sustainable development.Looking ahead Yunnan Tin will uphold the ESG principles integrate sustainable development into every link of the

Company's strategic planning operation management and daily decision-making. We will continuously optimize

corporate governance to enhance our competitiveness strengthen environmental protection to preserve the natural

environment and actively fulfill our social responsibilities to give back to society. We believe that through unremitting

efforts Yunnan Tin will steadily advance on the path of sustainable development create greater value for shareholders

and make greater contributions to society.Chairman of Yunnan Tin Co. Ltd.

03 04Yunnan Tin Company Limited 2024 Sustainability Report

Corporate Development and ESG Milestones

1883200820142020

The predecessor of the Company was Gejiu Factory The Company ranked among the ten most popular listed The Company won the title of Advanced Collective in the With good business development performance and

Merchants Bureau established in the ninth year of the companies in Yunnan Province. National Non-Ferrous Metal Industry. social responsibility the Company won the title of

reign of Emperor Guangxu of the Qing Dynasty. The Company won the title of "Excellent Supplier of "Most Socially Responsible Listed Company" on the List

Baosteel" and was selected as the sample of the Shenzhen of Chinese Listed Companies with Good Reputation.

1992 Component Index for the first time the Top 100 Enterprises

2015

The Company acquired 75.74% of the equity in Hualian

The "YT" Fine Tin trademark was registered at the by the 10th Golden Bull Award for Listed Companies in 2021

China and the sample stocks of the Shenzhen 100 Index. Zinc Indium for a consideration of RMB 3.7 billion.London Metal Exchange (LME). The Company's first performance briefing and 2020

Annual Report Performance Briefings were successfully

2009 2016 selected as the "2020 Excellent Practice Case of Annual

1998 The Company was appointed by the National Standardization The Company became the first listed company complete Report Performance Presentations of Listed Companies"

With the approval of the People's Government of Administration of the People's Republic of China to undertake the market-oriented "debt-to-equity swap" among locally by the China Association for Public Companies along with

Yunnan Province Yunnan Tin Company Gejiu Tin the work of the Secretariat of the Tin and Tin Alloy Working state-holding enterprises nationwide. other 200 listed companies nationwide.Capital Industrial Company Gejiu Xidu Nonferrous Metal Group (TC243/SC2/WG2) of the Heavy Metal Sub-Technical

Processing Plant Gejiu Juyuan Industrial and Mining Committee of the National Nonferrous Metals Standardization 2022

Company and Gejiu Yinguan Tin Arts and Crafts Factory Committee responsible for organizing and mainly undertaking 2017 Shenzhen Information Co. Ltd. a wholly-owned

jointly initiated the establishment of Yunnan Tin Co. Ltd. the task of formulating and revising tin industry standards. The Company was ranked 190th in the List of China's Top subsidiary of the Shenzhen Stock Exchange officially

500 Enterprises published by Fortune. launched the National Securities ESG rating. The

2000 2010 Company achieved an AA rating and was successfully

"Yunnan Tin" A-shares were listed on the Shenzhen The Company won the 2010 China's Best Wealth Creation IR 2018 included in the Shenzhen ESG Benchmark Index and

Stock Exchange with the stock code being 000960. (Investor Relations Management) Award. Shenzhen ESG Leading Index.The Company implemented the first share repurchase in its

history.

2002 2011 The annual tax payment of the Company hit a record high. 2023

The Company was selected into the list of world-

The Ausmelt furnace was completed and put into The Company won the Golden Eagle Award at the 7th The Company won the "National Market Quality Credit class professional leading demonstration enterprises

operation increasing production efficiency by 20 times Annual Conference of China's Securities Market. A-level User Satisfaction Enterprise" Certificate (AA User created by the State-owned Assets Supervision and

and setting a world record for the largest tin smelting Satisfaction Level).

2012 Administration Commission of the State Council;capacity of an Ausmelt furnace.

The Company was selected as one of the 2012 Top The Company was awarded the "First Prize of the

2005 100 Capital Brands of Listed Companies in China. 2019

Science and Technology Award 2022 for China's

The Company was included in the FTSE Russell Nonferrous Metals Industry".The output of tin metal reached 42720 tons ranking

2013 Index S&P Emerging Markets Index and MSCIIndex first among tin production enterprises.

The Company won the title of "Customer Satisfaction with the Company's business philosophy and 2024

Enterprise" from the China Association for Quality. development prospects fully recognized by global The Company won the "2023 ESG Pioneer Practitioner

2006 authoritative institutions. Case" award.

The Company became one of the first manufacturers The Company signed a cooperation agreement with

of raw materials and devices in line with the EU RoHS the Yunnan Tin Sub-center of the National Engineering

directive. Research Center of Vacuum Metallurgy.The Company received an "A" rating in information

2007 disclosure for the 2023-2024 period from the Shenzhen

The Company won the title of "Top 100 Best Investor Stock Exchange.Relations Management in China in 2006".The "YT" brand of Yunnan Tin was rated as a famous

trademark in Yunnan Province.

05 06Yunnan Tin Company Limited 2024 Sustainability Report

Performance in 2024

Made a total tax payment of RMB 1803.2286 million Achieved an operating revenue of RMB 419.73 million

Net Profit Attributable to Owners of the Parent Company of RMB

Organized and participated in 130 investor communications

14.44 million.

Docked with 488 institutional and individual investors Newly obtained 52 patent authorizations including 20 invention

patents and 32 utility model patents.Received 25 one-on-one visits paid by shareholders.Invested RMB 397.48 million in R&D

Answered 167 questions on irm.cninfo.com.cn

01 03 Obtained a comprehensive customer satisfaction score of 97.19Received a total of 168 calls from investors

Realized a 100% signing rate of the Commitment to Compliance and

Corporate Economic Integrity by suppliers

Governance Achievement

Had 4771 ethnic minority employees

Invested RMB 316.69 million in environmental protection Had 115 employees with disabilities

Generated and used 80274 MWh of renewable electricity Hired 622 veteran employees

Used 1802232 MWh of clean energy Spent RMB 13.6857 million on employee training and offered

Utilized 77972096 m3 of recycled/reused water 9251 training sessions with an average training duration of

45.24 hours per employee.

Recycled/reused 3008205 tons of waste

Invested RMB 266.7975 million in safety production

Completed ecological restoration of 110.39 hectares of mine areas

Participated 1059 employee volunteer activities with an average

Offered 746 training sessions on laws and regulations typical cases 02 volunteer service duration of 216.8 hours per employeegovernance technologies and other knowledge concerning ecological and 04

Invested RMB 1.9804 million in rural revitalization with the

environmental protection with 46100 person-times of participants. Environmental Social

Protection number of persons assisted up to 5491 Contribution

07 08Yunnan Tin Company Limited 2024 Sustainability Report

Honorary Performance Honorary Performance

Tin Branch Won the Title of the National The Company was Honored the "May Fourth Red

"Green Factory" Flag Youth League Committee 2023"

The Company Received the Panorama Investor Relations Gold Award (2023) - Exemplary

Investment Relations Award Outstanding ESG Value Communication Award and Outstanding

The Company Won a Number of Science The Company received the National May Institutional Communication Award

and Technology Progress Award 1st Labor Award证书

The Company was awarded the title of 云南锡业股份有限公司入选中国上市公司协会

"Healthy Enterprise in Yunnan Province" 2024 年上市公司可持续发展优秀实践案例。

特发此证，以资鼓励！中国上市公司协会二零二四年十一月

The Company Received the 2024 Excellent The Company Was Honored the "2024 Outstanding Practice Case in Sustainable The Company Was Awarded the 2024 Typical Case of Best Cases of Good Practices of the Board of Development" and the "2023 Best Practice Case of Annual Report Performance Practices in Digital Transformation for Listed Companies Directors in Listed Companies Briefings" from the China Association of Public Companies.

9 10Yunnan Tin Company Limited 2024 Sustainability Report

Honorary Performance ESG Management

Sustainable development has become a key driving force for the Company to achieve long-term value growth and

stable operations. The Company places high importance on the deep integration of business management and ESG

principles and incorporates ESG elements into the Company's decision-making process to ensure that they are

embedded in every aspect of strategic planning operational management and daily decision-making. To further

enhance the effectiveness and timeliness of the Board of Directors' supervision of sustainable development matters

and strengthen the integration of the sustainable development strategy and the operation policy the Company has

established an ESG management structure with the Board of Directors as the highest responsible body to coordinate

and advance ESG management efforts and improve the Company's sustainability level.ESG Management Principles

"YT" Tin Ingots Was Awarded a Four-star Rating for

Customer Satisfaction by the "China Association

for Quality"

Integration into

Corporate Strategy Alignment to Global

Standards

The Company Received the 26th Golden Bull Award

for Listed Companies - 2023 Golden Information

Disclosure Award Synergy with

Business

Development

"YT" Zinc Ingots Received a Three-Star User

Satisfaction Rating by "China Association for Quality"

The Office of the Board of Directors Was

Certificate of Mineral Supply Chain Recognized as the Excellent Practice Case of

Due Diligence Assessment - Level A the Office of the Board of Directors of Listed

Companies for 2024

11 12Yunnan Tin Company Limited 2024 Sustainability Report

ESG Management Structure and Responsibilities Stakeholder Communication

· Act as the highest responsible body for ESG management and disclosure in the Company. The Company attaches great importance to communication and interaction with both internal and external

· Review and approve the Company's ESG strategic plans and programs. stakeholders. Through various channels the Company engages in dialogue with stakeholders to gain a deeper

understanding of their demands and expectations strives for their trust and support and promotes the continuous

· Review and approve the ESG governance structure and important ESG systems. improvement of ESG management efforts of the Company.· Review and approve the Company's ESG-related information disclosures and reports.Board of

Directors · Review and approve the public disclosure of material information relating to the Company's

ESG governance Stakeholders Expectations and Demands Communication and Response

· Review and respond to ESG-related risks and major negative ESG events that have a significant

impact on the Company General Meetings of Shareholders

Economic Performance

Shareholders Board Meetings Financial Reports

Corporate Governance

and Senior Man- Business Reports Roadshows and

· Conduct research and provide recommendations on the Company's long-term development Compliance Risk Control

strategy and major investment decisions. agement Communication with the Company Business Ethics

etc.· Conduct research and provide recommendations on major investment and financing plans that

require the approval of the Board of Directors

· C onduct research and provide recommendations on major capital operations and asset Corporate Governance Regular Communication and

management projects that require the approval of the Board of Directors Government Business Ethics Reporting Institutional Research

and Regulatory

· Identify risks and opportunities related to the Company's sustainable development conduct Environmental Management Policy Implementation Information

research analysis and risk assessment on ESG-related matters guide and supervise the Agencies Waste Discharges Disclosure etc.formulation and implementation of ESG systems and objectives and provide decision-making

consultation including ESG governance vision goals policies ESG risks etc.Relevant · Organize and coordinate the supervision and inspection of the Company's ESG-related policies Innovation and R&D

Specialized management performance and goal progress and propose corresponding recommendations On-site Communication Market

ESG Supply Chain ManagementCustomers and Surveys Supplier Training

Committees · Review the Company's strategies risks and execution related to ESG management (including Supply Chain Due Diligence

but not limited to focusing on the Company's greenhouse gas reduction response to climate Suppliers Transparent Procurement Product Quality

change water resource protection and management biodiversity scientific and technological Customer Satisfaction Surveys etc.Privacy and Data Security

innovation social contributions) and propose recommendations

· C onduct research and provide recommendations on other major matters that affect the

Company's development Employees'Rights Interests and Benefits

Employee Activities Employee

· Monitor the implementation of the above matters Employees Employee Development and Training Training Employee Handbook etc.· H andle other matters authorized by the Board of Directors Occupational Health and Safety

Supply Chain Management

· Formulate ESG strategic plans and ESG-related system policies. Supply Chain Due Diligence

Industry Conferences Strategic

· D evelop ESG management system and indicator system and make ESG disclosure Partners Scientific and Technological R&D and Partnerships Exchange Visits etc.· Implement the Company's ESG strategy and ESG responsibilities Innovation

Relevant Product quality

Investment · M aintain regular communication with stakeholders and regularly identify material ESG topics

and ESG · Focus on ESG development trends and policy updates

Management Community Volunteer Activities · O rganize ESG-related training Community the Ecological Environmental Protection

Review Social Welfare Programs Social

Groups · Implement other matters required by the relevant specialized committees under the Board of Public Media Community Public Welfare Undertaking Support Programs

Directors etc. Investor Relations Management etc.

13 14Yunnan Tin Company Limited 2024 Sustainability Report

Analysis of Topics of Double Materiality

In order to gain a deeper and more accurate understanding of stakeholder expectations and demands and to Matrix of Topics of Double Materiality

enhance the professionalism relevance and substance of this report the Company invites stakeholders through Significance

questionnaires to select topics of "impact materiality" and "financial materiality" regarding the Company's With Impact Materiality Rather With Double

environmental social and governance matters. These topics are then disclosed in the report laying the direction than Financial Materiality Product and Service

Social Contribution Safety and Quality

Materiality:

and foundation for the Company's sustainable development system.Corporate Governance

Supply Chain Due Diligence

Human Rights Protection ESG Management

Topic Materiality Analysis Process Environmental Compliance Management

Due Diligence Data Security and Customer

Privacy Protection Innovation-Driven Development

Anti-Unfair Competition

Understanding of the Company's activities and business relationships Rural Revitalization Stakeholder Communication

Rural Revitalization

· U nderstand company activities and business relationships Tailings ManagementParty building

· U nderstand the external objective environment Compliant Operations Rights and Interests of Circular Economy Shareholders and Investors

· K now about major affected stakeholders Anti-Commercial Bribery Employees

and Anti-Corruption

Waste Disposal Energy Utilization

Without Impact Materiality Pollutant Emissions With Financial Materiality Rather than

Water Resource Utilization

Identify ESG topic pool or Financial Materiality Addressing Climate Change Impact Materiality:

Ecosystem and Biodiversity Conservation

· I dentify other potentially material topics by reference to peer companies rating standards and insignificance Financial Significance Significance

other rules based on the topics identified according to the Guidelines

· I dentify the related impacts risks and opportunities of the topics and summarize them to

form the Company's topic pool Environmental Social Governance

Addressing Climate Change Rural Revitalization Due Diligence

Assess and rank the materiality of topics Pollutant Emissions Social Contribution Stakeholder Communication

· I dentify impact materiality and financial materiality assessment results through questionnaires Waste Disposal Innovation-Driven Anti-Commercial Bribery and

interviews etc. Development Anti-Corruption

Ecosystem and Biodiversity

· Integrate the evaluation results and form a matrix of topics of double materiality Conservation Supply Chain Due Diligence Anti-Unfair Competition

Environmental Compliance Equal Treatment of Small and

Management Medium-Sized Enterprises Party Building

Energy Utilization Product and Service Safety and ESG Management

Confirm and report the materiality of topics Quality

Water Resource Utilization Data Security and Customer

· C onfirm or adjust the results of the material topics in conjunction with opinions from the Privacy Protection

Compliant Operations

management Circular Economy Employees Corporate Governance

· D isclose material topics in the annual ESG report as per the Guidelines

Tailings Management Human Rights Protection Rights and Interests of Shareholders and Investors

1516

Impact MaterialityTin Branch

01

Advancing Steady Progress

Grounded on Strong Governance Corporate Governance

Adhering to the responsibilities as a state-owned enterprise and the goal of high-quality development and Compliance Risk Control

focusing on information disclosure Yunnan Tin will continuously optimize corporate governance further enhance Investor Relations Management

communication with investors and strive to increase the Company's investment value. The Company will effectively

achieve the "improvement in both quality and return" to promote the active and healthy development of the capital Anti-Commercial Bribery and Anti-Corruption

market. In addition the Company strictly conducts compliance risk management continuously builds a clean and

honest environment and leads the Company's sustainable development with high-quality Party building. Party Building

17 18Yunnan Tin Company Limited 2024 Sustainability Report

Corporate Governance

Powers and Responsibilities of the Board of Directors the

Good corporate governance is the cornerstone of sustainable development of an enterprise. Yunnan Tin always General Meeting of Shareholders and the Board of Supervisors

maintains a highly responsible attitude towards shareholders and continuously improves corporate governance

structure in strict accordance with applicable laws and regulations such as the Company Law of the People's

Republic of China the Securities Law of the People's Republic of China the Code of Corporate Governance for Listed

Companies. The Company has successfully established a decision-making mechanism centered around the General

Meeting of Shareholders the Board of Directors the Board of Supervisors the Party Committee and the Senior

Management to ensure clear division of responsibilities efficient coordination and effective governance. During The General Meeting of Shareholders is the highest governance body of the

the Reporting Period the Company standardized the implementation of internal governance systems such as the Company. The Company convenes and holds the General Meeting of Shareholders

Articles of Association the Rules of Procedure for the General Meeting of Shareholders the Rules of Procedure for the in a standardized manner in strict accordance with the Company Law of the People's

Board of Directors and the Rules of Procedure for the Board of Supervisors and standardized the organization of the Republic of China the Articles of Association the Rules of Procedure for the General

meetings of the Board of Directors the General Meetings of Shareholders and the Board of Supervisors to ensure the General Meeting

scientific and transparent decision-making process. of Shareholders

Meeting of Shareholders and other relevant regulations and requirements to ensure

that all shareholders especially minority shareholders cam enjoy an equal status and

Organizational Structure fully exercise their legitimate rights.General Meeting of

Shareholders

Audit Committee

Performance and Board of Board of The Board of Directors reviews and makes decisions on major matters of the Company

Compensation Directors Supervisors in strict accordance with its powers and responsibilities defined in the Articles of

Committee

Party Committee Association. The notification convening voting methods and other procedures of the

of the Company meetings of the Board of Directors comply with the provisions of the Company Law of

Nomination the People's Republic of China and the Articles of Association and the minutes of the

Committee General Manager Secretary of the Board of meetings are complete and standardized. All directors are able to work in accordance Board of Directors Directors with applicable laws and regulations attend the meetings of the Board of Directors

Strategy and and the General Meeting of Shareholders diligently fulfill their duties and obligations

Investment Deputy General actively participate in relevant training and learning familiarize themselves with

Committee Manager applicable laws and regulations and improve their ability to perform their duties.The Company strictly implements the election procedures for the Board of Supervisors

in accordance with the Articles of Association and other applicable regulations. The

Board of Supervisors actively exercises its supervisory responsibilities reports to the

General Meeting of Shareholders and supervises the legality of the Company's finances

Board of and the performance of duties by the Company's directors and senior management.Supervisors

It focuses on key matters such as hedging and connected transactions to effectively

protect the legitimate rights and interests of the Company and its shareholders.

1920

Discipline Inspection Group in the

Company Accredited by the Discipline Comprehensive Office of

Inspection Commission of Yunnan Tin Discipline Inspection Group

Group Holding Co. Ltd.Supervision

Party and Mass Work Department

Party Committee Office

Administrative Office

Human Resources Department

Mine Management Center

Operation Management Department

Science and Technology Investment

Department

Safety and Environmental

Protection Department (Emergency

Management Center)

Securities Department (Strategic

Management Department)

Finance Department

Market Operation Center

Audit and Risk Control DepartmentYunnan Tin Company Limited 2024 Sustainability Report

Key Performance Case The Company Organized On-Site Surveys by Independent Directors to Enhance Corporate

Governance

As of the end of 2024 the Board of Directors had a total of 9 directorsincluding 1 female directorand 3

independent directors. In August 2024 to implement the requirements for on-site research by independent directors as set out in the

Measures for the Administration of Independent Directors of Listed Companies the Company organized a one-

In 2024 the Company Held 7 meetings of the Board of Directorswith 100% attendance rate of week on-site research of its subsidiaries by independent directors. During the research period the independent

the Board members and 0 directors attending fewer than 75% of the meetings; directors conducted a comprehensive research of the production operations financial management safety

environmental protection and other aspects of the Company and based on their professional backgrounds

Convened 7 meetings of the Board of Supervisors and experience provided targeted management recommendations to the Company further enhancing the

Hosted 3 meetings of the General Meeting of Shareholders Company's governance level.The Company strives to achieve the effectiveness independence diversity and professionalism of the operation of

the Board of Directors. We endeavor to promote diversity on the Board of Directors in terms of professional skills

industry experience occupational background gender and culture in order to promote diversity in development.Basic Information of Directors

Liu Luke（Male） Li Shiyon（Male） Zhang Yan（Male）

Non-ferrous metal

mining smelting deep Board Secretary

processing supply Legal affairs and related experience and On-Site Surveys by Independent Directors On-Site Surveys by Independent Directors

chain and enterprise enterprise management enterprise management

management

Wu Hongxing（Male） Chen Xiongjun（Male） Li Dening（Male）

Non-ferrous metal

smelting and enterprise Marketing and Finance and strategic

management enterprise management development

Compliance Risk Control

In 2024 the integrated "internal control risk management and compliance governance" management system of

Yuan Rongli（Female） Wang Daobin（Male） Yu Dingming（Male） the Company officially began operations. This new management system has improved the Company's internal

control and risk prevention mechanisms standardized internal governance and reinforced the awareness of risk and

Accounting financial Analysis and finance of Legal education and compliance among all employees which effectively ensures the compliance and stability of all business activities education and financial the non-ferrous metal legal service and provides strong support for the Company's standardized management risk prevention and compliance management industry operations. The Company continues to fulfill its tax obligations and manage tax-related risks to ensure its

sustainable operations.

21 22Yunnan Tin Company Limited 2024 Sustainability Report

Integrated Management System Combining "Internal Internal Control Objectives Internal Control Modes

Control Risk Management and Compliance Governance"

Internal

Control

Objectives

Internal

Internal Control Control Modes

Based on risk assessment results and with internal control methods that integrate manual control and automated

Compliance Risk control as well as preventive control and detective control the Company keeps risks within an acceptable range

Governance Management through control measures such as incompatible duties segregation authorization and approval accounting system

asset protection budget management operational analysis and performance evaluation.Risk Identification Evaluation and Response Process

Identify risk Review risk Categorize risk Prepare risk

Lines of Defense Against Compliance Risks matters and risk matters and risk information into

assessment

points points risk databases questionnaires based on risk databases

Conduct risk

assessments

Develop major risk Update the internal Summarize and and fill out risk

response measures control and calculate the risk assessment

Establish risk based on the list of compliance manual assessment results questionnaires

monitoring major risks and risk based on updated and form a risk map

indicators and

Supervisory Compliance Business strategies risk databases and a list of major risksimplement risk

Functional Management Functional monitoring

Departments Departments Departments

Third Line Second Line First Line

Collect risk measurement

of Defense of Defense of Defens standards and indicator data Promptly Regularly prepare

evaluate the indicator values initiate response risk event

and give early warnings measures monitoring reports

2324

Reduce prevent and control

risks

Promote the realization of

the Company's development

strategy

Improve operational efficiency

and effectiveness

Ensure the Company's

operations and management

are legal and compliant

Safeguard the asset security of

the Company

Ensure the Company's financial

reports and related information

are true and completeYunnan Tin Company Limited 2024 Sustainability Report

Case

The Company Conducted Risk Assessments to Improve Risk Management Level Tax Management System Tax Risk Management System

In April 2024 the Company issued a risk management and assessment report based on prior risk

identification and assessment. Through the assessment the Company analyzed the internal and external The Financial Management The Company collects internal and external relevant information

environments affecting its business operations and identified and categorized potential risks in its Department is the primary in a comprehensive systematic and continuous manner and

business activities. The identified risks were evaluated in two dimensions: the likelihood of occurrence department responsible for taking into account the actual situation and identifies tax risks

and the degree of impact. In addition the Company proposed effective preventive measures against major the tax management of the in the Company's business activities and processes through

risks promoted the fulfillment of risk management responsibilities and improved risk management level. Company. The Company assigns steps such as risk identification risk analysis and risk evaluation.tax administrators to perform tax We analyze and describe the likelihood and conditions of

management duties. risk occurrence and assess the impact of risks on our tax

Case

The Company Organized Training on Risk Management to Enhance Practical Capabilities management objectives to determine the priority and strategies

for risk management.In June 2024 the Company organized training on "Internal Control Risk Management Compliance

Governance and Internal Audit". Guided by leading practices and innovative research the training analyzed

the advanced practices of internal control and risk management in benchmark enterprises and helped Tax Control and Risk Management Measures

relevant personnel in the Company further understand the law and essence of risk management as well as

the challenges and bottlenecks in the risk management process to enable them to master comprehensive

Key Performance The Company hires an intermediary agency with the required methods for addressing major corporate risks and practical capabilities in risk management internal qualifications and professional capabilities to conduct regular

control and compliance management. tax inspections every year. The intermediary agency will check

In 2024 the Company paid a total of whether the Company has calculated and paid taxes for all

economic operations conducted by the Company during

RMB 1803.2286 million in taxes. the year in strict accordance with applicable tax laws in a

timely and accurate manner whether tax matters have been

handled in strict accordance with prescribed procedures and

whether tax files are managed is in compliance with applicable

regulations.The Company dynamically manages tax risks on an annual

basis and promptly assesses the changes in existing risks and

any newly generated tax risks. Based on the results of tax risk

assessment and the cost and benefits of risk management

we formulate tax risk response strategies within the overall

management and control system establish an effective internal

The Company Organized Training on "Internal Control Risk Management Compliance Governance and

Internal Audit" control mechanism and reasonably design tax management

processes and control methods to achieve comprehensive

control of tax risks.The Company maintains effective communication with the

Tax Management competent tax authorities and other relevant units to establish

and improve systems for collecting and updating tax policies

Tax management is a crucial cornerstone for an enterprise to ensure compliant operations and enhance financial and regulations related to the Company's business operations.transparency. The Company attached great importance on tax compliance viewing it as a crucial link in fulfilling

social responsibilities and maintaining a good business reputation. Through the establishment of a sound tax Tax-related training sessions are offered annually for the

management system we are committed to optimizing tax processes reducing tax risks and ensuring the accuracy Company's financial personnel to strengthen their tax

and timeliness of tax filings. awareness.

25 26Yunnan Tin Company Limited 2024 Sustainability Report

Investor Relations Management

Key Performance

The Company always attaches great importance on two-way communication with the capital markets organizes

high-quality performance briefings and conducts investor research and communication activities. With the ongoing In 2024 the Company Organized and participated in 130 investor communication events

success and innovation of the Company's performance briefings in recent years the Company's performance Docked with 488 institutional and individual investors

briefings have repeatedly won honors such as "Best Practice Case" and "Outstanding Practice Case of Performance

Briefings" from the China Association for Public Companies. Additionally the Company has been continuously Received 25 one-on-one visits paid by shareholders

invited by various institutions to share experiences in performance briefings marking high recognition from regulatory

authorities self-regulatory organizations investors and other market players for the Company's remarkable Answered 167 questions on irm.cninfo.com.cn

achievements in the management of performance briefings and investor relations.Received a total of 168 calls from investors

Case The Company Held an Annual Report Performance Briefing to Deepen Communication with

Improve communication efficiency through channels such as irm. Investors

Improvement

cninfo.com.cn hotlines on-site surveys teleconferences performance

of Investor

briefings and generally reply to questions raised on irm.cninfo.com.cn

Relations I n A p r i l 2 0 2 4 t h e C o m p a n y

within 24 hours. successfully held the 2023 Annual

Re p o r t Pe r fo r m a n ce B r i e f i n g

a n d I n ve sto r C o m m u n i cat i o n

Introduce the interpretation of social responsibility reports the analysis Meeting through the Investor

Forms of of industry dynamics messages from stakeholders the presentation of Relations Interactive Platform in

Innovative visualized annual reports and other sections through video livestreaming the form of a "live meeting + video

Performance and annual report performance briefings and adopt digital and virtual l ivestreaming". The Company

reality technology. s h a r e d w i t h i n v e st o r s a b o u t

Yu n n a n T i n ' s 2 0 2 3 o p e rat i n g The Company Held an Annual Report Performance Briefing

results industry developments and Investor Communication

and the results of Yunnan Tin's

Form monthly reports through shareholder structure analysis provide E S G e f f o r t s a n d e n g a g e d i n

Regular Analysis

feedback to the Board of Directors and management on investor deep discussions on investor

of Investors

concerns and open up communication channels. concerns. The performance briefing

effectively promoted Yunnan Tin's

intrinsic investment value to the

capital market communicated the

Company's voice to a wide range

Increase the cash dividend ratio to continuously enhance shareholder

of investors listened to investor

Focus on returns; conduct share buybacks and cancellations; and strengthen the

viewpoints and suggestions and

Shareholder communication of the senior management and the investor relations

fully accepted scrutiny from the The Company Held an Annual Report Performance Briefing

Returns team with research analysts to enhance the attention of the capital

capital market. and Investor Communication

market.

27 28Yunnan Tin Company Limited 2024 Sustainability Report

Key Honors Anti-Commercial Bribery and Anti-Corruption

The Information Disclosure Work of Yunnan Tin Received an "A" Rating from the Shenzhen Stock Exchange in 2023-2024 Yunnan Tin attaches great importance to the integrity education of employees and management staff at all levels.and continuously strengthens internal governance to strictly prevent and control fraudulent activities. Through

continuously revising and improving the Anti-Fraud Management System of Yunnan Tin Co. Ltd. the Company

clearly designates the comprehensive office of the discipline inspection group as a permanent anti-fraud institution

and urges employees and managers at all levels to strictly abide by the relevant rules and regulations of the

superior discipline inspection commission and the Provisions on Filing Records of Interference in Enterprise' Normal

Operations and Management Activities (for Trial Implementation) to ensure that the Company's operation and

management activities are standardized honest and efficient.Information Disclosure Evaluation Results from the Shenzhen Stock Exchange

In October 2024 the Company received a Circular on the Assessment Results of Information Disclosure by Listed

Companies in 2023-2024 from the Shenzhen Stock Exchange according to which the Company received a "A" rating

(the highest rating) in the assessment by the Shenzhen Stock Exchange. According to the evaluation results only Whistleblower Protection System

487 out of 2810 companies listed on the Shenzhen Stock Exchange received an "A" (excellent) rating accounting for

17.33% of the total number of listed companies evaluated.

The Company has established a dedicated whistleblowing

email and hotline. Any violations or misconduct by Party

Returns to Shareholders members or officials if observed may be reported to the

Discipline Inspection Group in the Company Accredited by

To actively reward shareholders and share them with operating results the Company under the premise of the Discipline Inspection Commission of Yunnan Tin Group

complying with the Company's profit distribution policy and ensuring its normal operations and long-term Holding Co. Ltd. (Tel.: 0871-64983008). This protects

development implemented a cash dividend distribution plan to issue a cash dividend of RMB 2.60 (tax inclusive) per whistleblowers' legal rights and provide a solid information

10 shares to all shareholders in May 2024 with the total distributed cash dividend amounted to RMB 427908507.52

feedback channel for internal anti-fraud efforts within the

(tax inclusive). In January 2025 the Company implemented the interim dividend distribution for the first time by

issuing a cash dividend of RMB 1.00 (tax inclusive) per 10 shares to all shareholders with the total distributed cash Company.dividend amounted to RMB 164580195.20 (tax inclusive) fully demonstrating the Company's responsible attitude in

striving to reward the market and shareholders.

29 30Yunnan Tin Company Limited 2024 Sustainability Report

Accountability and Remedies Case The Company Held a Conference on Party Integrity Construction and Anti-Corruption to Promote

the Normalization of Clean Governance

To effectively enforce accountability the Company has stipulated that: Leaders shall be held accountable

In March 2024 the Company held the Party Integrity Construction and Anti-Corruption Working Conference to

for the occurrence of fraud due to negligence within the scope of their supervisory or in-charge work.comprehensively implement the anti-corruption deployment for holding companies and further strengthen

The Company's management personnel shall also be held accountable for violations during their

the construction of corporate anti-corruption systems. The conference emphasized that in 2024 the Company

direct operation or participation in decision-making within the scope of their duties. In response to the

would continue to promote the integrated construction of the "Three No-Corruption" deepen political

problems that have occurred the affected business units shall carry out a comprehensive assessment and

supervision focus on key areas and critical links resolutely investigate corruption issues and strengthen

improvement of internal controls. The Company's business dealings with customers suppliers and other

the line of defense against corruption. At the conference relevant personnel also signed the Commitment to

relevant units shall be based on integrity and fairness and relevant requirements for the Company's all

Party Integrity Construction reinforcing responsibilities at all levels and promoting the normalization of clean

anti-fraud work shall be communicated in a timely manner.governance to provide a solid guarantee for the high-quality development of the Company.Disciplinary Measures and Handling Procedures

In accordance with the relevant regulations the Company shall impose severe punishment for violations

of the anti-fraud management provisions. Those who violate the law shall be handed over to the judicial

organs according to applicable laws. Clear and strict disciplinary measures and handling procedures help

continuously improve the Company's governance level ensure the implementation of all management

systems and effectively prevent and curb the occurrence of corruption.The Company Held the 2024 Party Integrity Construction and Anti-Corruption Working Conference

Continuous Supervision and Governance Improvement

To ensure the long-term validity of the anti-fraud management system the Company continuously Case Kafang Branch Conducted Party Integrity Education Activities to Promote the Company's Integrity

monitors and tracks whistleblower information and issues found in internal inspections and takes Culture Construction

corrective measures promptly. The continuous optimization of internal governance systems and

supervision mechanisms empowers the Company to constantly enhance its integrity and self-discipline

creating a clean positive and stable operating environment and further strengthening the Company's In January 2024 Kafang Branch held a kick-off meeting for the

competitiveness in the market. warning and education of Party integrity under the theme of

"Integrity Escorts and Leads Clean Kafang to Clean Governance and

Long-term Development". The activity aimed to strengthen party

integrity construction enhance the awareness of party members

and cadres of integrity and self-discipline through warning

education and case study and promote the normalization of

integrity construction. The meeting proposed the establishment of

a "Clean Kafang" mechanism to prevent corruption and clarified

the integrity responsibilities of Party members and cadres. The

activity helped to promote the Company's integrity culture Kafang Branch Held a Kick-off Meeting

construction laying a solid foundation for the sustainable and for the Warning and Education of Party

Integrity

healthy development of the Company.

31 32Yunnan Tin Company Limited 2024 Sustainability Report

Party Building Powers and Responsibilities of the Party Committee and

Dispatched Discipline Inspection Group

Adhering to the guidance of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era the

Company fully practice the spirit of the 20th CPC National Congress and the 3rd Plenary Session of the 20th CPC

Central Committee and thoroughly studies and implements General Secretary Xi Jinping's important thoughts on Clarifying the boundaries Giving full play to the role of

party building. Driven by the goal of fulfilling the key annual tasks of party building and promoting the effective of authority and the Party Committee

integration of party building with production and operation based on "three lists" the Company is committed responsibilities

to advancing key initiatives such as the study and education of Party discipline and the "Year of Promoting High-

Quality Development of Provincial Enterprises through Party Building" event ensuring their thorough and effective Party Committee

implementation. These efforts continuously strengthen the Party's leadership in supporting and enhancing our and Dispatched

ability to tackle critical challenges deepen reforms expand markets and stabilize operations thus providing a solid Discipline

political ideological and organizational foundation for building the Company into a world-class professional leading Inspection Group

demonstration enterprise. Comprehensively

Defining the legal status of

promoting corporate

the Party organizations

governance

Decision-Making Framework Comprising the General Meeting of

Shareholders the Board of Directors the Board of Supervisors the

Party Committee and the Senior Management

Key Performance

General Meeting of

Shareholders In 2024 the Company organized 8 special study sessions for the theoretical center groups of the Party

Committee

Conducting Preliminary Two-way Entry Cross

Party Research Appointment The members of the Party Committee attended 6 study sessions for the theoretical center groups of the

Organization Party Committee

Leading cadres at all levels delivered 62 speeches gave 462 Party lectures

Board of Directors

Setting Direction

Gasping Overall Setting Strategy Making Decisions

Situation Ensuring Preventing Risks

Implementation.Management

Planning Operation Ensuring Implementation Strengthening Management

Mutual Independence Clearly Defined Responsibilities and Powers Coordinated Checks and Balances

Effective Governance

3334

Board of Supervisors

Supervision

Two-way

Entry Cross

Appointment云Yu南nn锡an业 T股in 份Co有m限pa公ny司 Limited 2024 Sustainability Report

Case The Company Deepens Learning Refines Understanding and Strengthens Implementation to Case The Company Conducted Research and Supervision of the "Three Lists" to Promote the Effective

Promote the Effective and Practical Advancement of Party Discipline Education Integration of Party Building with Production and Operations

In 2024 the Company held a Party committee meeting to make arrangements for the study of In June 2024 the Company conducted a supervisory inspection of the Copper Branch's implementation

party discipline. The Company established a dedicated working group specifically responsible of the "Three Lists" of the Implementation Measures and "Flowchart" for Promoting Effective Integration

for In 2024 the Company held a Party committee meeting to make arrangements for the study of of Party Building with Production and Operation (for Trial Implementation) . Through field research

party discipline. The Company established a dedicated working group specifically responsible

for this matter and formulated relevant implementation plans. The Party Committee organized exchanges at seminars reviews of ledgers and other similar means the Company urges the Copper Branch

Party discipline study and education in the forms of reading sessions specialized tutoring to strengthen the implementation of the key tasks of party building and effectively promotes the deep

thematic seminars by the Party Committee's Theoretical Study Group disciplinary lectures integration of party building with production and operation.warning education sessions and summary meetings while the Party branches conducted Party

discipline study and education through "Three Sessions and One Lesson" Thematic Party Day

etc. Additionally the Company comprehensively coordinated and guided party organizations at all

levels through the "five studies" initiative which requires these party organizations systematically

study General Secretary Xi Jinping's important thesis on comprehensively strengthening the

Party's disciplinary construction strictly abide by the Regulations on CPC Disciplinary Action

carefully and effectively carry out education training and warning for Party members and cadres

integrate Party discipline study and education into daily practice on a regular basis and promote

Party discipline study and education to be deeper and effective.The Party Committee of Yunna Tin Launched a Reading Session for Party Discipline Study and Education The Company Conducted an Inspection of the Party Building at the Copper Branch

35 36Yunnan Tin Company Limited Kafang Branch Mine Rehabilitat2i0o2n4 SAucshtaieinvaebmilitey nRtesport

02

Realizing Sustainable Development

Rooted in Environmental Protection Environmental Compliance Management 「"a Topic of Double Materiality"」

In the wave of the era of sustainable development Yunnan Tin deeply recognizes that the environment is the foundation of Energy Utilization

enterprise development and has always adhered to the philosophy of green development. In strict accordance with applicable

laws regulations and industry standards the Company: carries out environmental compliance management; actively responds Water Resource Utilization

to the energy "dual control" policy optimizes the energy structure and improves energy utilization efficiency; establishes

and improves management systems to strengthen the recycling and protection of water resources; continuously upgrades Pollutant Emissions

technology and equipment strictly controls pollutant emissions; adheres to the principles of waste minimization waste Waste Disposal

valorization and environmentally sound management and actively explores waste recycling methods; actively implements

carbon peak and carbon neutrality strategies formulates plans to address climate change to reduce carbon emissions; sets clear Addressing Climate Change

goals and achieves significant results in the utilization of resources such as gypsum residue and tailings; actively carries out

ecological restoration and other work to protect ecosystems and biodiversity. Yunnan Tin is making every effort to build a new Circular Economy

pattern of green development through multiple measures and working tirelessly to achieve the synergy between the economy

and the environment. Ecosystem and Biodiversity Conservation

37 38Yunnan Tin Company Limited 2024 Sustainability Report

Environmental Compliance Management Organizational Structure for Environmental Management

「 "a Topic of Double Materiality"」 Safety Production Comprehensively responsible for the leadership organization supervision

and Ecological

Environment guidance and coordination of management work related to safety production Governance Protection Committee ecological and environmental protection occupational health and other areas.In 2024 Yunnan Tin continuously improved the environmental management system around the environmental

management policy and further optimized the ecological and environmental protection responsibilities of all Safety and Responsible for the Company's daily environmental management work and for

departments and personnel at all levels in the Company. In line with the national laws regulations and relevant Environmental guiding inspecting and supervising the environmental management work carried

requirements on ecological and environmental protection the Company revised the Ecological and Environmental Protection out by each branch (subsidiary).Protection Responsibility List of Yunnan Tin Co. Ltd. and the Supervision and Management Measures for the Department

Inspection and Management of Ecological Environmental Protection of Yunnan Tin Co. Ltd. and published and

implemented the Solid Waste Pollution Prevention and Control Management System of Yunnan Tin Co. Ltd. and the Establishing a management framework for ecological and environmental protection

Measures for the Administration of Tailings Pollution Prevention and Control of Yunnan Tin Co. Ltd. with the Party Committee Secretary and (General) Manager fully responsible for

Environmental Policy Branches the work the Vice (General) Manager in charge of ecological and environmental (Subsidiaries) protection specifically responsible and the environmental protection management

organization overseeing comprehensive supervision while business management

departments handle specialized management.Excellence Pursuit Integrity Adherence Having a Deputy Director in charge of environmental protection and environmental

Law Compliance People Orientation Workshops (Pits) management personnel responsible for the environmental management of the

workshop (pit).Energy Conservation Low Carbon

Green Development In 2024 the Company actively promoted ISO14001 certification. Through internal audits management reviews and third-party audits among other multi-dimensional review mechanisms we organized a comprehensive

inspection and diagnosis on the effectiveness compliance environmental target indicator achievement and major

environmental risk control of the operation of the Company's environmental management system. We are committed

to identifying and solving problems promoting the continuous improvement of environmental performance and

consolidating the foundation for the sustainable development of the Company.Existing Environmental Management Policies of the Company Environmental Management System Certification

Measures for the Administration Ecological and Environmental

01 of Ecological and Environmental 02 Protection Responsibility List of Yunnan

Protection of Yunnan Tin Co. Ltd. Tin Co. Ltd.Measures for the Administration Measures for Environmental Protection

of Ecological and Environmental

03 Assessment and Reward/Punishment Protection Inspection and 04 (for Trial Implementation) of Yunnan

Supervision of Yunnan Tin Co. Ltd. Tin Co. Ltd.

05 Solid Waste Pollution Prevention 06 Measures for the Administration of and Control Management System of Tailings Pollution Prevention and

Yunnan Tin Co. Ltd. Control of Yunnan Tin Co. Ltd.

39 40Yunnan Tin Company Limited 2024 Sustainability Report

Building of Green Factory Impact Risk and Opportunity Management

In 2024 all units of Yunnan Tin strictly implemented technical documents concerning environmental risk

management such as the General Principles of the Technical Guidelines for the Construction of the Dual Prevention

Mechanism for Environmental Management the Technical Guidelines for the Construction of the Dual Prevention

Mechanism for Environmental Management - Identification and Classification of Pollution Sources the Technical

Guidelines for the Construction of the Dual Prevention Mechanism for Environmental Management – Classified

Management and Control of Environmental Risks and the Technical Guidelines for the Construction of the Dual

Prevention Mechanism for Environmental Management – Identification and Management of Potential Environmental

Hazards. In addition. They dynamically updated the pollution source identification and classification lists and the

environmental risk classification and control lists effectively formulated environmental risk management and

control measures regularly conducted the assessment and management of potential environmental hazards and

effectively prevented and mitigated major environmental risks.Dual Prevention Mechanism and Process for Environmental Risks

Identification and Identify Pollutant Sources

Classification of

Pollutant Sources Classify Pollutant Sources

Strategy

Identify Environmental Risks

In early 2024 Yunnan Tin held an annual safety and environmental protection work meeting thoroughly studied and

implemented Xi Jinping Thought on Ecological Civilization and implemented the spirit of the relevant meetings. Classify Environmental Risks

The Commitment to Safety Production Fire Protection and Ecological and Environmental Protection were signed Identification

by employees at all levels further enforcing their primary responsibilities for ecological and environmental Classification

protection. In addition the Opinions on 2024 Safety and Environmental Protection Arrangement of Yunnan Tin Co. and Control of

Ltd. was issued detailing requirements for aspects such as the management and control of environmental risks Environmental Risks

Formulate Control Measures

and the prevention and mitigation of accident hazards and relevant plans for advancing safety and environmental

protection work were formulated and issued for implementation. Implement Classification and Control of Environmental Risk

Identify Potential Environmental Safety Hazards

Conduct

Identification

and Management Determine the Criteria for the Identification of

of Potential Potential Environmental Safety Hazards

Environmental

Safety Hazards Conduct Identification and Management of

Potential Environmental Safety Hazards

Conduct the Operational Evaluation of the Dual

Operational Prevention Mechanism

Evaluation

The Company Held an Annual Safety and Environmental Protection Work Meeting and Signed a Commitment to

Ecological and Environmental Protection Responsibility. Make Continual Improvement

41 42Yunnan Tin Company Limited 2024 Sustainability Report

Classification and Control Mechanism against Environmental Risks

Metrics and Targets

Risk Identification Risk Classification Classification and Control The Company from a strategic height continuously injects stable funds for environmental protection with a total

investment of RMB 316.69 million in 2024 and is committed to building a model of green enterprises.Identification Unit: Divide Classification Method: Measure Categories: Cover

risks into 5 categories by Determine the risk level with 5 categories: engineering

pollutant sources stated in the the multi-factor evaluation management system

Pollutant Source Identification method (scoring based on 5 emergency response and other Compliance Management

and Classification List and factors) the direct judgment measures.comprehensively identify method and the expert

Measure Formulation: The Company strictly implements the Law of the People's Republic of China on Environmental Impact Assessments risks according to specific diagnostic method.Target risk sources formulate the Regulations on the Administration of Construction Project Environmental Protection the Interim Measures procedures.Risk Classification: Classify measures with the "4M1E for Environmental Protection Acceptance Inspection Upon Completion of Construction Projects the Measures

Situation Clarification: risks into four categories: Method" and define for the Administration of Post-Acceptance Environmental Impact Assessment of Construction Projects (for Trial

Clarify three situations: Major Risks (Level I) High responsible departments. Implementation) and other laws and regulations and strictly follows the "three simultaneities" of environmental

total emissions exceeding Risks (Level II) General Risks

Measure Review: Organize protection equipment and facilities during the construction of the project the environmental impact assessment limits non-compliant (Level III) and Low Lows

operation of environmental (Level IV) and prioritize personnel to evaluate and of construction projects and the system for environmental protection acceptance upon project completion. At the

protection facilities and non- the determination of ensure all measures are feasibility study stage of project construction regarding ecological and environmental protection measures as an

compliant procedures/facility management and control comprehensive accurate and important basis for feasibility studies we actively promote environmental management of construction projects

conditions. requirements for actual feasible. in accordance with applicable laws and enhance supervision and guidance before during and after the project

risks that do not match

Identification Method: First Control Requirements: construction to ensure that construction projects are legally compliant.the classification results

systematically identify the Conduct differentiated control according to the Company's

relevant systems of pollutant for different risk levels with actual management needs. Achievement of Environmental Management Goals for Construction Projects in 2024

sources and divide them into higher control levels for higher

subsystems and then analyze risks. The risks controlled

the key control points with the by the upper level are also

"4M1E Method" to determine managed by the lower level.environmental risks. List Preparation: After each

round of identification and

evaluation prepare a risk

classification and control

list and summarize risk Projects Projects Obtaining Projects Passing Projects Completing

information. Completing EIA EIA Approval Environmental Post-Assessment EIA

Filing Protection Acceptance

upon Completion

Copper Smelting Flue Technological 125 kt/a Cathode Datachong Tailings

Gas Denitrification Transformation Copper Upgrade and Pond in Datun Tin Mine

Technology Research Project for Quality Renovation Project for

Project of the Copper

Branch Improvement the Electrolytic System

and Efficiency of Copper Branch

Dust Collection Enhancement of

Equipment Renovation Daping Ore Dressing Engineering

Project for Tin-

Copper Paragenic Ore Workshop of Hualian

Construction Project

Zinc Indium for Simultaneous Processing Process in Tailings Paste

Kafang Branch Zinc Alloy Expansion Backfilling System of

Project of Wenshan Datun Tin Mine

Zinc Indium

43 44Yunnan Tin Company Limited 2024 Sustainability Report

Emergency Management Environmental Protection Promotion Initiative

In 2024 to actively respond to the national call for ecological and environmental protection Yunnan Tin organized

In 2024 the Company continuously optimized and improved its emergency management system for environmental theoretical studies through the central group of the Party Committee. Leaders and cadres were deeply engaged in

emergencies stipulating provisions for the preparation of emergency response plans environmental risk learning the thought on ecological civilization and played a leading role. Special training sessions were offered

assessment emergency material investigation the filing management and evaluation of emergency response plans and environmental protection experts were invited to give detailed explanations of applicable laws regulations

training on emergency response plans and relevant drills. Additionally each production unit of the Company has and technologies related to pollution control. External training was also organized to allow employees to learn from

formulated emergency drill plans for sudden environmental incidents and regularly organized emergency plan advanced environmental protection experiences in other regions. Through a series of trainings the ecological and

training and drills for sudden environmental incidents effectively preventing and controlling the occurrence of such environmental protection awareness among employees at all levels of the Company was significantly improved

incidents. laying a solid ideological foundation for the Company to practice the philosophy of green development in production

Case operations reduce environmental pollution risks and achieve sustainable development.Emergency Drills to Build a Line of Defense against Environmental Emergencies

Case

Knowledge Empowerment by Providing Environmental Protection Handbooks to Enhance Awareness

In 2024 Wenshan Zinc Indium Hualian Zinc Indium Datun Tin Mine and other units jointly carried out Among All Employees

government-enterprise joint drills with local governments. The production units of the Company carried

out 114 trainings on the emergency response plan and emergency management for environmental

emergencies with a total of 3215 participants. They also organized 85 emergency response drills for In 2024 the Company conducted in-depth research on

various types of environmental emergencies such as leakage of exhaust gases tailing ponds rollover the complex business processes of mining dressing

wading or dam failure with 1859 participants in the drills. The emergency drills not only tested and smelting etc. We comprehensively sorted out the

improved the emergency plans but also enhanced the ability of government and enterprises to respond provisions of laws and regulations on ecological and

to environmental emergencies in a coordinated manner strengthened the level of emergency response environmental protection from the national core

of the relevant personnel and built a solid foundation for effectively preventing and responding to environmental protection laws to local industry-specific

environmental risks and safeguarding ecological and environmental safety. regulations for environmental issues that may arise

in production. We also compiled the Handbook of

Ecological and Environmental Protection Knowledge Handbook of the Ecological and

in the Yunnan Tin and distributed it to all units of Environmental Protection Knowledge

of Yunnan Tin

the Company encouraging employees to study

independently during their spare time through online and offline learning channels. The Handbook of the

Ecological and Environmental Protection Knowledge effectively enhanced the environmental protection

awareness of personnel at all levels in a concise and easy-to-understand manner further supporting the

Company's compliance in production and contributing experience to the industry's green development.Training on Emergency Response Plans Training on Emergency Response Plans

Case

An Environmental Lawyer was Invited to Strengthen the Line of Defense for Legal Compliance

In 2024 to strengthen the legal awareness of all employees for environmental protection the Company

invited a professional lawyer to offer training on laws and regulations concerning environmental

protection. Through clear and engaging explanations combined with real and vivid case studies the

lawyer made complex legal knowledge accessible and understandable. More than 170 employees actively

Emergency Drill for Tailings Pond Emergency Drill for Gas Leakage participated in the training including senior executives key leaders from all units and departments

as well as environmental management personnel and technical experts. This training not only helps

Key Performance employees to grasp the key points of environmental protection regulations in a timely manner to

avoid legal risks in production and operation but also improves the Company's overall environmental

protection management level and contributes to the green and sustainable development of the

In 2024 no major sudden environmental incidents occurred in any units of the Company and no environmental Company.event penalties were imposed on the Company.

45 46Yunnan Tin Company Limited 2024 Sustainability Report

Case

The Company Improved the Factory Environment to Build a Beautiful Yunnan Tin

In 2024 the Company made significant efforts to improve the factory environment aiming to make its

workspaces clean comfortable and healthy. Employees actively participated by sweeping factory roads

removing surface stains clearing weeds around premises to refresh the surroundings and trimming

greenery to enhance the landscape aesthetics. These initiatives led to a noticeable transformation of

our factory environment significantly improving the workspace while demonstrating the Company's

Training on Ecological and Environmental Protection Knowledge commitment to employee well-being and a high-quality working environment helping to shape a positive

corporate image and promoting harmonious development.Case

The Company Promoted June 5 Environment Day to Build a New Path for Green Development

Together

In June 2024 in alignment with Xi Jinping Thought on Ecological Civilization and relevant conference

directives as well as the guidelines of the Ministry of Ecology and Environment the Company based on

its own operation needs organized a series of promotional activities for the "June 5 Environment Day" to

deepen in-depth study of relevant thoughts strengthen green awareness enhance public outreach foster

an ecological culture and encourage employee to participate in ecological civilization initiatives. The Employees Actively Participated in Building A Beautiful Yunnan Tin

"June 5 Environment Day" event helped to guide the whole company to practice the philosophy of "lucid

waters and lush mountains are invaluable assets" mobilize employees and their families to participate in

the construction of a beautiful China create a good ecological and environmental protection atmosphere

and promote the sustainable development of the Company.Employees Actively Participated in Building A Beautiful Yunnan Tin

The Company Promoted "June 5 Environment Day" by Going into Communities and

Organizing Environmental Protection Product DIY Contests Key Performance

In 2024 the Company's subsidiaries branches and workshops (pits) offered a total of 746 training sessions on

laws and regulations typical cases and governance technologies for ecological and environmental protection with

46100 person-times of participants.

The Company Organized Tree Planting Activities for the "June 5 Environment Day"

47 48Yunnan Tin Company Limited 2024 Sustainability Report

Energy Utilization Utilization of Clean/Renewable Energy

Currently the clean/renewable energy used by the Company mainly includes hydropower electricity from

waste heat electricity from waste energy natural gas etc. Electricity is the primary energy consumed by

Yunnan Tin in accordance with relevant management requirements the Company and approximately 84% of total electricity consumption by the Company is clean electricity.integrates energy management into the Quality Environmental Among them waste heat and waste energy power generation account for 4.8% of clean electricity.Occupational Health and Safety Energy Management System

In 2024 the Company completed a portion of tailings pond projects and other PV power generation

achieving integrated management. Through continuous annual

projects. It is expected that after these projects are put into operation in 2025 the additional power

inspections and internal audits we ensure that the system is controlled

generation capacity will be 18 million kWh.and operated properly. In 2024 the Company formulated the Measures

for the Administration of Energy Conservation and included the

comprehensive energy consumption of smelting products into the

Case

annual appraisal system as a key appraisal index in accordance with ISO 50001 Energy Management New-Energy Loaders Drive Energy Conservation Benefit Creation and Green Development

GB25323-2023 The Norm Of Energy Consumption Per Unit Production System Certification

Of Nonferrous Heavy Metals Metallurgical Enterprises . Through measures such as continuous optimization of With the advancement of the national strategy of "carbon peaking and carbon neutrality" Datun Tin Mine

production processes and effective implementation of energy conservation technologies we ensured the steady introduced 2 new-energy loaders to be used for ore loading supply and short-distance ore transfer at

improvement in energy utilization efficiency and the realization of refined and scientific energy management the raw ore yard to address problems of fuel-powered loaders such as high energy consumption high

contributing to the achievement of our sustainable development strategic goals. maintenance costs and significant pollution. The new-energy loaders have significant advantages in

terms of power performance environmental protection and maintenance and demonstrate remarkable

Key Optimization Initiatives for Energy Conservation and Consumption Reduction in 2024 results after being put into use: significant reduction in energy cost reduction at least 1200 yuan per day

compared to fuel-powered loaders; easier maintenance

operations lower maintenance costs; long ser vice

Upgrading with Energy-Efficient Technology life reduced equipment renewal costs; avoidance of

The Company conducted the "Research on the Application of High-Voltage Variable-Frequency Speed environmental risks promotion of the transformation

Regulation Technology for MBY2740 Rod Mill" and completed the renovation of the first set of high-voltage to clean energy structure and a reference for the green

variable-frequency speed-regulated rod mills. development of the industry.The Company achieved more than one function optimization energy conservation and consumption

reduction with the annual electricity saving per unit of equipment being 15%. New-energy Loaders

Application and Promotion of Permanent Magnet Motor Case

Renovation of Refining Furnaces and Crystallizers for Energy Conservation Unlocks New Momentum

The Company conducted the "Research on the Application of High-Voltage Variable-Frequency Speed for Cost Reduction and Efficiency Improvement

Regulation Technology for MBY2740 Rod Mill" and completed the renovation of the first set of high-voltage

variable-frequency speed-regulated rod mills.In 2024 to implement the "Three-Year Cost Reduction and Efficiency Improvement" Action Plan the

The Company achieved more than one function optimization energy conservation and consumption Company addressed the high energy consumption and poor control stability of refining furnaces and

reduction with the annual electricity saving per unit of equipment being 15%. crystallizers by replacing the infrared heating with original resistance heating and used a PID-controlled

thermostat to conduct energy-saving transformations on the crystallizer's tank body feed pot and other

components. The renovated crystallizers showed remarkable results: the capacity per unit increased

Waste Heat Power Generation by more than 10% the comprehensive electricity consumption decreased by more than 20% and the

electricity cost decreased by nearly RMB 0.2 million per year. This technological transformation reduced

The Company continued to promote the renovation for the power generation from waste heat of the production costs and improved production efficiency providing strong support for the realization of the

smelting process and the annual self-generated electricity amounted to 80.274 million kWh for grid Company's cost reduction and efficiency improvement goals.connection or self-consumption effectively improving the energy utilization rate.

49 50Yunnan Tin Company Limited 2024 Sustainability Report

Case Key PerformanceThe Optimization and Upgrading of the Ventilation System Opens a New Chapter for Energy

Conservation in Mines

In 2024 the Company's comprehensive energy consumption in smelting decreased by 2.5% when compared with

From 2023 to 2024 Laochang Branch Datun Tin Mine and Kafang Branch implemented an underground

ventilation system optimization project for the mines. They optimized ventilation routes reduced system that in 2023 realizing the goal of achieving a 1% decrease in the comprehensive energy consumption of tin copper

installation power and replaced high-consumption low-efficiency motors with Class-I energy-efficient

motors to achieve energy conservation and consumption reduction. In July 2024 the project passed and zinc smelting in 2024 when compared to 2023 as set out in the Three-Year Cost Reduction Plan.inspection and acceptance. The three mines reduced the installed power of the ventilation system

by a total of 3133 kW the actual power consumption of fan operation was reduced by 20% and the Energy Conservation Goal for 2025: In 2025 the company's comprehensive energy consumption per unit of smelting

annual power consumption was reduced by 9.28 million kWh. This effectively reduced the Company's product will be controlled to a level better than the national first-grade standard.operating costs improved energy utilization efficiency and provided strong support for the sustainable

development of the mines.Indicator Unit 2024

Comprehensive Energy

Consumption tce 399079Case

Waste Heat Recovery Creates Economic Benefits and Contributes to Green Smelting

Energy Usage Intensity tce/10000 yuan of revenue 0.10

In 2024 to promote green and high-quality development the Company implemented a project to recover

waste heat from the condensate water in the copper smelting system and the wastewater discharged from Direct Energy Consumption tce 138229

boilers. With the condensate water in the steam pipeline and the wastewater discharged from medium-

pressure boilers as the sources of waste heat the Company transformed the flash distillation recovery

Including: Coal ton 127556

equipment preheated the desalinated water with the flash distillation steam and recovered condensate

water through a condenser. The project has shown significant results after being put into operation. In

2024 it reduced low-pressure steam usage by 1257 tons desalinated water usage by 9303 tons and Including: Gasoline Liters 258060

generated 143300 kWh of electricity which not only improved energy utilization efficiency but also

reduced operating costs and enhanced the Company's green competitiveness. Including: Diesel Liters 28921368

Including: Natural gas m3 9063900

As per applicable regulations and requirements such as the Measures for Cleaner Production Audit and the Law

of the People's Republic of China on the Promotion of Clean Production the Company continues to carry out Indirect Energy Consumption tce 260850

mandatory cleaner production audits. Currently the Company's branches (subsidiaries) namely Datun Tin Mine

Kafang Branch Copper Branch Tin Branch and Hualian Zinc Indium have all passed the cleaner production audit Including: Electric power MWh 2122459

and acceptance.In response to the policy for the dual control of total energy consumption and energy intensity the Company Total purchased electricity MWh 2042185

attaches great importance to the development and utilization of renewable energy continues to formulate rigorous

annual energy management objectives and plans and includes total electricity consumption as the main energy Consumption of Self-generated MWh 80274

consumption into the annual energy plan with the planned total electricity consumption being 2 billion kWh. Renewable Electricity

In terms of electricity procurement strategy the Company has adopted a market-oriented operation mode and Clean Energy Consumption MWh 1802232

purchases electricity from external organizations in a uniform way. 80% of the purchased electricity is from clean

energy power generation and 20% is from coal-fired power generation. This optimizes the energy structure and

enhances the proportion of green energy. Clean Energy Usage Rate % 57.97

Energy Consumption in 2024

51 52Yunnan Tin Company Limited 2024 Sustainability Report

Water Resource Utilization Pollutant Treatment

Yunnan Tin is actively evolving into a national water-saving enterprise. The Company carries out daily inspections Yunnan Tin attaches great importance to wastewater and waste management and regards it as a key for sustainable

according to GBT7119-2018 Evaluation Guide for Water-saving Enterprises strengthens water-saving publicity and development. In 2024 the Company strictly implemented environmental impact assessment and pollutant discharge

formulates a series of water resource management systems such as the Measures for the Administration of Water permit management systems completed the application for pollution discharge permits and ensured that pollutant

Supply and Drainage. With management focus on water conservation water source protection and the prevention concentrations met emission standards and that the total discharge volume complies with permit requirements. We

and control of risks in water consumption the Company included the goal of achieving a 1% continuous decrease in also continuously optimized internal governance rules executed in-house standards stricter than industry standards

water consumption per unit product into the annual assessment in accordance with the requirements of the Three- and implemented special emission limits for subsidiaries in key areas. In addition the Company developed a

Year Cost Reduction Plan . The Company reduces new water consumption at the source by optimizing production scientific wastewater and waste monitoring plan adopted diversified monitoring methods built prevention and

processes and equipment; strengthens the comprehensive utilization of mine inflow water to achieve water resource control facilities according to environmental impact assessment requirements and took multiple measures to

recycling; regularly inspects water pollution risks and promotes the rational use of water resources and water enhance wastewater and waste management levels actively practicing the green development philosophy.environmental protection in an all-round manner.Pollution and Waste Management Goals and Achievements in 2024

Key Performance

In 2024 the Company continued to carry out water-saving and consumption reduction measures and increased the

recycling of water resources. With the decrease in water resource usage intensity the water resource recycling rate of Wastewater is discharged

the Company has improved year by year. The emission of exhaust according to the license domestic Solid waste is disposed of

pollutants meets applicable sewage is discharged into the according to regulations with a

standards. urban sewage treatment facilities disposal rate of 100%

and production wastewater is not

2 1.84 95.0% discharged.

94.5%

1.8 94.5% Achieved Achieved Achieved

1.74 94%1.6 94% Key Performance

1.493.5%93.2%

1.42

1.2 93% In 2024 No significant deficiencies were observed in the Company's environmental monitoring plans and risk

1 92.5% management measures; No environmental issues such as excessive emissions or major spills occurred in the

202220232024202220232024

Company and No penalties due to pollutant discharge were imposed on the Company.Water Resource Usage Intensity in the Past Water Resource Recycling Rate in the Past

Three Years (tons/10000 yuan) Three Years (%)

Wastewater

指标 单位 2024 2023 2022 The wastewater pollutants generated by the Company are mainly production wastewater produced during the ore

dressing process the smelting process and deep processing units with the primary water pollutants being chemical

Total water consumption ton 4569150 5220742 5487423 oxygen demand (COD) ammonia nitrogen heavy metals etc.Total Consumption of Fresh Water m3 4569150 5220742 5487423 In the principle of "diverting clean water from waste water and separating rainwater from sewage" the Company

sets up rainwater pipelines and sewage pipelines for the classified collection of various types of wastewater and

Recycled/Reused Water m3 77972096 82097308 76128121 builds sedimentation tanks initial rainwater collection tanks thickeners production wastewater treatment systems

domestic wastewater treatment systems backwater pump stations and other wastewater collection and treatment

Water Resource Utilization in 2024 facilities to classify and treat different types of wastewater.

53 54Yunnan Tin Company Limited 2024 Sustainability Report

Indicator Unit 2024 2023 2022

Total Wastewater Discharges 10000 m3 137 117 265

Including: Total Industrial Wastewater 10000 m3 137 117 265

Including: Total Domestic Wastewater 10000 m3 - - -

Chemical Oxygen Demand (COD) kg 24351 17775 51250

Biochemical Oxygen Demand (BOD) kg / / /

The Company's Wastewater Discharge Units Apply for Pollutant Discharge Permits in Accordance with Applicable

Laws Ammonia Nitrogen (NH3-N) kg 219 807 7586

Total Nitrogen (TN) kg 4141 2383 10206

Total Phosphorus (TP) kg 45 52 123

Optimization Measures for Wastewater Treatment in 2024 Total Arsenic kg 6 16 57

Suspended Solids in Wastewater kg 12364 6757 28846

Upgrading of Groundwater Monitoring System

Wastewater Discharge in 2024

Each mining unit evaluated the groundwater monitoring wells at the tailings ponds and waste rock yards in

service and upgraded unreasonable monitoring systems to ensure the effectiveness of groundwater monitoring

Waste Gases

Research on Deep Treatment of Tailings Wastewater

The Company's waste gas pollutants are particulate matter-containing waste gases generated during the ore dressing

Hualian Zinc Indium conducted a study on the deep treatment of wastewater discharged from tailing ponds: process and the material storage and transportation process as well as smelting gases containing pollutants such as

Industrial trials of composite water treatment agents and COD removal agents were carried out at the Tongjie sulfur dioxide nitrogen oxides and heavy metals that are generated during the metal smelting process.Dagou Tailings Pond; industrial trials of biological agents and high-efficiency fluorine removal agents were

conducted at the Nanjia Tailings Pond which provided technical reserves for the Company's deep treatment of In strict compliance with the Environmental Protection Law of the People's Republic of China Self-monitoring

tailings wastewater. Technology Guidelines For Pollution Sources—General rule and other laws regulations and standards the Company

formulates a waste gas monitoring plan. The quality of monitoring is ensured through both self-monitoring and

outsourced monitoring. Moreover the Company actively builds air pollution control facilities. For areas prone to dust

Diversion of Clean Water from Waste Water in Tailings Pond emissions measures such as using gas collection hoods and spraying water for dust suppression are implemented to

Hualian Zinc Indium completed the Dongbang Construction Project for the Diversion of Clean Water from Waste reduce dust and unorganized waste gas emissions actively promoting air pollution control efforts and contributing

Water in Nanjia Tailings Pond which guided the watershed from mountains in Dongbang into the downstream to a better atmospheric environment.of the tailings pond reducing the water inflow to the tailings pond and lowering wastewater discharge.Rainwater-Sewage Separation in Hazardous Waste Slag Yard

Tin Branch completed the preliminary construction for the closure of the hazardous waste slag field carried

out feasibility studies and closure design shaped the top slag heap as designed and covered it with an

impermeable membrane to achieve rainwater-sewage diversion reducing rainwater infiltration and leachate

generation.The Company's Waste Gas Discharge Units Apply for Pollutant Discharge Permits in Accordance with Applicable Laws

55 56Yunnan Tin Company Limited 2024 Sustainability Report

Optimization Measures for Waste Gas Treatment in 2024 Waste Disposal

Upgrading of Dust Removal Facilities The solid wastes generated by the Company are mainly waste rock and tailings from the mining process as well as

smelting slag and arsenic-containing hazardous wastes from smelting flue gas purification and wastewater treatment

Copper Branch and Hualian Zinc Indium replaced the original bags in bag filter with ultrafine fiber bags; Kafang in the smelting process.Branch used a high-efficiency wet dust remover to replace the original water curtain dust collector to further

reduce the particulate emissions in the waste gas and ensure that the particulate matter meets the industry's In strict compliance with regulations and policies such as the Environmental Protection Law of the People's Republic

special emission limits. of China and the Law of the People's Republic of China on the Prevention and Control of Environmental Pollution by

Solid Wastes the Company aiming to achieve waste minimization waste valorization and environmentally sound

management controls the quantity at source through technical research strengthens the utilization of solid waste

Denitrification of Off-Gas from Acid Production Process

resources and promotes the management of

Copper Branch and Hualian Zinc Indium replaced the original bags in bag filter with ultrafine fiber bags; Kafang historical slag heaps to prevent and control

Branch used a high-efficiency wet dust remover to replace the original water curtain dust collector to further the risk of pollution. In 2024 the Company

reduce the particulate emissions in the waste gas and ensure that the particulate matter meets the industry's i n t r o d u c e d t h e S o l i d W a s t e Po l l u t i o n

special emission limits. Prevention and Control Management System

and the Measures for the Administration of

Upgrading of Dust Removal Facilities Tailings Pollution Prevention and Control to

further standardize solid waste management

Wenshan Zinc Indium addressed the dust issues at the leaching slag transfer warehouse and transfer slag yard strengthen preventive measures ensure the

by increasing the height of the surrounding enclosure and adding roller doors controlling the generation and safety of tailings pond environments and

emission of dust and further improving the surrounding environment. The Company's units engaged in hazardous waste operation actively promote solid waste management in accordance with applicable laws apply Hazardous Waste

Tin Branch completed the preliminary work for closing and sealing the hazardous waste slag yard conducted efforts. Management License

a feasibility study and closure design for the hazardous waste slag yard and covered the top of the slag heap

with an impermeable membrane according to the closure design requirements effectively controlling the

generation of dust.Management of Wastes

By formulating and implementing the Measures for the Administration of Solid Waste the Company has formulated

Indicator Unit 2024 2023 2022 management measures for the entire process of solid waste from generation to disposal and stipulated pollution

Total Exhaust Gas Emissions 10000 m3 736311 757900 994090 prevention and compliance management requirements for solid waste management plans labeling ledger records

transfer management storage and landfill pollution control IoT construction emergency management etc.Nitrogen Oxides (NOx) Emissions kg 201954 230061 237357

Sulfur Oxides (SOx) Emissions kg 127653 122079 189630

S/N Unit Hazardous Waste Disposal Method

Volatile Organic Compounds (VOCs) Emissions kg / / /

Particulate Matter (PM) Emissions kg 39201 47796 56790 Centrifugal slag aluminum slag sulfur slag acid sludge electric furnace smelting slag charcoal slag tin smelting soot Self-utilization

Ammonia (NH3) Emissions kg / / / Arsenic-containing soot anode sludge waste mineral oil zinc Outsourced

Hydrogen Chloride (HCL) Emissions kg / / / carbonate cadmium slag utilization

1 Tin Branch Self-landfill

Arsenic Hydrogen (AsH3) Emissions kg / / / Calcium sulfate slag or outsourced

Phosphine (PH3) Emissions kg / / / disposal

Waste salt waste contaminants waste asbestos waste chemicals Outsourced

Air Pollutant Emissions in 2024 waste resins disposal

57 58Yunnan Tin Company Limited 2024 Sustainability Report

S/N Unit Hazardous Waste Disposal Method Case Multiple Measures to Promote Mine Waste Management and Utilization

Black copper sludge anode sludge silver-splitting slag copper

fume Self-utilization

In 2024 the Laochang Branch adopted different disposal measures for general solid waste and hazardous

Copper fume lead filter cake waste catalyst waste mineral oil Outsourced

waste lead storage batteries utilization waste generated from mining and ore dressing: Waste rock from underground excavation was used

2 Copper Branch for filling underground mined-out areas processed into concrete materials and road materials and

Neutralization slag arsenic filter cake Self-landfill tailings were stored in the tailings pond. Hazardous waste such as waste mineral oil was placed in

temporary storage and storage bins and was disposed of or recycled by qualified companies. Through

Salt-containing sludge arsenic sulfide residue waste insulation Outsourced the implementation of these measures the Company filled a total of 31.72 million tons of waste rock into

cotton waste contaminants disposal underground mined-out areas reducing the stockpile in the waste dumps and extending the service life of

3 waste dumps. The required construction materials were supplied in a timely manner reducing costs and

Zinc scum Self-utilization environmental risks and achieving resource recycling.

3 Wenshan Zinc Leaching slag copper sinking slag copper concentrate cobalt Outsourced Indium concentrate acid sludge waste mineral oil waste lead batteries utilization

Arsenic sulfide residue contaminated waste online monitoring Outsourced

waste liquid and waste asbestos felt disposal

Laochang Branch Waste mineral oil waste lead batteries Outsourced

Kafang Branch utilization4 Datun Tin Mine

Hualian Zinc Indium Waste lubricating oil waste contaminants laboratory waste liquid

Outsourced

disposal

Arsenic-containing soot waste mineral oil copper slag aluminum Outsourced

5 Yunxiang Mining

slag utilization

and Metallurgy Sludge from the sewage station waste liquid under online Outsourced

monitoring disposal

Main Hazardous Waste and Disposal Methods

Storage Bin for Hazardous Waste

S/N Unit Hazardous Waste Disposal Method

1 Tin Branch Water-quenching slag Self-landfill or outsourced utilization

Slag selection tailings Self-landfill or outsourced utilization

2 Copper Branch

Desulfurization gypsum slag gypsum Outsourced disposal

Gypsum slag Self-utilization or outsourced

3 Wenshan Zinc Indium utilization

Neutralization slag Self-landfill or outsourced disposal

Laochang Branch Kafang Tailings Self-landfill

4 Branch Datun Tin Mine

Hualian Zinc Indium Waste rock

Self-utilization or outsourced

utilization

5 Yunxiang Mining and Metallurgy Desulfurization gypsum slag Outsourced disposal Yangbadi Tailings Pond for Stockpiled Tailings

Main Non-Hazardous Waste and Disposal Methods

59 60Yunnan Tin Company Limited 2024 Sustainability Report

Case Case

Training on Pollution and Waste Management to Assist Ecological Protection Learning from Experience Across Multiple Locations for Waste and Sewage Management

In 2024 the Copper Branch focused on waste and sewage management and conducted a series of key In 2024 the Company continued to strengthen hazardous waste management and pollution prevention

trainings. In the training on IoT construction for hazardous waste employees learned in-depth how to use efforts. We actively organized professional teams to travel to Sichuan Guizhou Shandong Zhejiang

IoT technology to achieve real-time monitoring and information management of the entire hazardous and other regions conducting on-site visits to local enterprises. The team explored advanced pollution

waste process and improve regulatory efficiency and accuracy. The training on the online monitoring of control technologies and the standardized management of hazardous waste disposal gaining detailed

pollution sources focused on the operation of advanced monitoring equipment data interpretation and insights into the operation principles of advanced equipment the application of innovative technologies

handling abnormal situations to ensure the timely and accurate grasp of pollutant emission dynamics. and efficient management processes. This learning experience helps the Company accumulate valuable

The training on standardized management of knowledge lays the foundation for the Company's compliant disposal of hazardous waste and enhances

hazardous waste provided detailed explanations the Company's pollution prevention capabilities. It also helps the Company establish a scientifically

on relevant laws policies ledger establishment efficient waste and sewage management system to improve pollution prevention capacity.safe storage and other key points. These

trainings help the Company meet environmental

compliance requirements reduce legal risks

caused by improper waste management improve

waste treatment levels minimize environmental

pollution and assist in ecological protection. Training on IoT Construction for Hazardous Waste

In-depth learning on Waste and Sewage Management at Multiple Enterprises

Training on Online Monitoring of Pollution Training on Standardized Management of

Sources Hazardous Waste Indicator Unit 2024 2023 2022

Total Waste Generation ton 55705406 58406200 30034600

Including: Total Hazardous

Waste ton 206838 216300 232700

Including: Total Non-

Hazardous Waste ton 55498569 58189900 29801900

Hazardous Waste Density tons / 10000 yuan of revenue 0.05 0.05 0.04

Non-Hazardous Waste Density tons / 10000 yuan of revenue 13.22 13.74 5.73

Total Recycled/Reused Waste ton 3008205 1135600 2950700

Waste Recycling Rate % 5.40 1.94 9.82

Waste Emissions in 2024

61 62Yunnan Tin Company Limited 2024 Sustainability Report

Waste Minimization Hazardous Waste Minimization in 2024

Quality Improvement through Sulfurization and Arsenic Removal: Focusing on the

problem of insufficient capacity of the hydrogen sulfide arsenic removal system the

In 2024 the Company coordinately advanced the research on comprehensive waste utilization and hazardous waste Company implemented sulfide arsenic removal transformation for quality improvement

minimization. With the goal of "minimizing the generation and disposal of low-value hazardous waste containing and achieved stable operation of the new treatment process.arsenic" The Company conducted surveys and in-depth on-site research to analyze and address key and difficult Optimization of Acidic Wastewater Treatment: The Company reviewed the water quality

issues and proposed measures to strengthen and improve work processes. entering the acidic wastewater treatment station optimized the treatment process

of acidic wastewater classified high-arsenic and low-arsenic wastewater for separate

treatment converted some low-arsenic solid waste into general solid waste and reduced

Technology the amount of hazardous waste disposal through multiple channels.Comprehensive Utilization of Solid Waste in 2024 Enhancement

for Hazardous Tin-Copper Smelting High-Arsenic Acidic Wastewater Coordinated Treatment Trial:

Waste The Company conducted experimental research on the sulfurization arsenic removal

Minimization system for treating tin smelting acidic wastewater. The treated sulfurized liquid has

arsenic content ≤ 30 mg/L achieving the expected targets. Currently the Company is

Treatment of Historical Iron-Sintered Ball Slags conducting experimental research on the high fluorine and chlorine content in the tin

smelting acidic wastewater laying the foundation for the next step of coordinated acidic

Exploring multiple channels for handling the iron-sintered ball slags left by Third wastewater treatment.Comprehensive Metallurgical the Company sold 194 thousand tons (95.9%) of such slag for outsourced

Utilization utilization turning the leftover slag into valuable resources.of General

Industrial Solid Simultaneous Tailings Slurry Filling Technology Copper Branch: From 2023 to 2024 the hazardous waste generation decreased from

Waste 27354 tons to 11893 tons reducing slag by 15461 tons a year-on-year reduction

Datun Tin Mine completed technological research and project construction. This project of 56.5%. By classifying wastewater disposal the Company conducted property

can fill 250k m3 of tailings into underground mined-out areas each year reducing the identification on neutralized slag and waste treatment transforming neutralized slag

amount of tailings entering the tailings pond by approximately 320 thousand tons. Hazardous from hazardous waste to general industrial solid waste.Waste Tin Branch: In 2024 the Company reduced hazardous waste disposal by 2919 tons.Minimization In particular 2025 tons of calcium carbonate slags were disposed of as general solid

Results waste and 894 tons of second-stage slags from acidic wastewater treatment were

comprehensively utilized.Research on Extracting Valuable Metals from White Soot

On the basis of the technological transformation of the white soot utilization project in Case Innovative Technology Achieved Hazardous Waste Slag Reduction and Promoted the Development

2023 the Company explored key technology applications and controlled key process of Green Metallurgy

parameters continuously improved the problems existing in the trial operation

process and realized the stable operation of the whole process of the technology for

Comprehensive In 2024 in response to the challenges of acidic wastewater treatment the Company initiated the Research

Utilization of comprehensive utilization of white soot. The comprehensive utilization of white soot for on the Application of the Minimization Technology to Arsenic-Containing Slags for Copper Smelting Acidic

Hazardous the whole year amounted to a total of 3507t. Waste Treatment of Yunnan Tin. This project aims to build an acidic sulfurization treatment system to

Waste

Comprehensive Utilization of Calcium Sulfate Slag in the Second Section of Acidic replace the original lime slurry system using methanol catalytic cracking for hydrogen production and

Waste Water Treatment other processes to treat acidic wastewater. The project has shown significant results with a substantial

decrease in the production of arsenic-containing gypsum slag and neutralized slag. The by-product

Without affecting process indicators the Company utilized the gasification furnace for gypsum has been utilized as a resource and the acidic wastewater is being recycled with zero emissions.the comprehensive utilization of calcium slag sulfate in the second section of acidic The tail gas meets the discharge standards. This not only reduces environmental pollution but also lowers

waste water treatment. the Company's operational and hazardous waste treatment costs meeting sustainable development

requirements and providing a demonstration of clean production in the smelting industry.

63 64Yunnan Tin Company Limited 2024 Sustainability Report

Management of Hazardous Chemicals Addressing Climate Change

The Company strictly follows the Regulations on the Control over Safety of Dangerous Chemicals Determination

Standards for Hidden dangers of Major Production Safety Accidents in Chemical and Hazardous Chemical Production Corporate Governance

and Operation Units and Dangerous Chemical Production and Operation Units Safety Specifications Of Special Work

In Hazardous Chemicals Enterprises as well as relevant regulations and internal rules such as the Safe Management Yunnan Tin actively responds to the major strategic decisions of the Party Central Committee and the State Council

Process of Dangerous Chemicals and Hazardous Operations of Yunnan Tin Co. Ltd. to ensure that the work on the regarding carbon peaking and carbon neutrality and fully lays out the green and low-carbon transformation.management of dangerous chemicals is in compliance with the rules and regulations. The Company has prepared the Carbon Peaking Implementation Plan and made efforts in multiple dimensions

Dangerous Chemicals Management System including structural adjustment management enhancement technological innovation digital empowerment

elimination of outdated process equipment and green energy manufacturing to improve the collaborative

Information Management efficiency of pollution reduction and carbon reduction in the industrial chain striving to build a green and low-

·List Update: Timely update the list of dangerous chemicals and accurately grasp the types and quantities of d chemicals carbon development pattern and ensuring the smooth achievement of the carbon peak target by 2030.in the Company.·Data Collection: Comprehensively collect safety technical data sheets and safety labels and provide accurate technical Strategy

information and warning messages for the safe management of dangerous chemicals.Risk Management and Contro In 2024 the Company carried out energy conservation and emission reduction as well as energy-saving and carbon

·Risk Identification: Organize professional technical personnel to carry out a comprehensive safety risk identification for reduction practices in an all-around multi-measure approach throughout the production and operation of the

the dangerous chemical production process systems usage processes and storage facilities identifying potential safety mining selection and smelting industry chain. In addition we issued the Notice on Carrying Out Carbon Emission

hazards. Accounting and Data Reporting Management Work and strictly conducted energy consumption data statistics

·Risk Assessment: Conduct risk evaluations to assess the severity and likelihood of occurrence of risks. Measure greenhouse gas (CO2) emission accounting data aggregation and reporting according to regulations ensuring

Formulation: Take appropriate safety measures to reduce the level of risk based on risk identification and evaluation comprehensive accurate and standardized management.results.Personnel Capability Enhancement Key Optimization Measures for Energy Conservation and Carbon Reduction in 2024

·Implementation of Training Plans: Offer safety training to key personnel safety management personnel and special

operation personnel handling dangerous chemicals according to the training plan. Optimization of Production Operations

·Knowledge and Skill Acquisition: Ensure relevant personnel are familiar with the physicochemical properties of

dangerous chemicals and knowledgeable about hazardous characteristics first aid measures emergency response Fully leverage the advantages of integrated regional mining and selection as well as the "three major

measures and personal protective measures. platforms" to continuously optimize various production systems such as mining development

transportation and ventilation. Optimize to make the regional system become more streamlined and

·Standardization of Operations: Standardize employees' operations ensure correct use of personal protective equipment efficient significantly improve transportation efficiency further enhance the matching level of mining and

and enhance employees' safety awareness and operational skills. selection coordinate various production processes to achieve energy conservation and carbon reduction

Optimization of Safety Evaluation and effectively promote energy-saving and emission-reduction in the production process.·Standardized Self-Assessment: Conduct an annual self-assessment of safety standardization to measure the extent to

which the Company's management of dangerous chemicals is in compliance with the standardization requirements.·Evaluation of Current Situation: Regularly assess the current status of safety management of dangerous chemicals and Promotion of Green Energy Use and Green Manufacturing

identify problems and deficiencies in management. System Improvement: Continuously revise and improve the operating

instructions and safety procedures and optimize the safety management system based on the assessment results. Optimizing Energy Consumption Structure: Vigorously reduce fossil energy consumption actively promote

Maintenance of Facilities and Equipment coal consumption substitution and transformation in the smelting process realize coal reduction and

·Regularly inspect and maintain safety facilities such as ventilation explosion prevention leakage prevention fire restriction in key coal-consuming processes and actively adopt measures such as using green electricity

prevention lightning protection sun protection moisture prevention theft prevention static electricity prevention instead of coal and natural gas instead of coal to adjust the energy consumption structure and reduce

and protective embankments as well as emergency equipment and facilities to ensure they are in effective operating carbon emissions.condition providing hardware support for the safe storage and use of dangerous chemicals.

65 66Yunnan Tin Company Limited 2024 Sustainability Report

Advancement of Digital Empowerment

Taking Renewable Energy Substitution Actions: Actively participate in the cooperative development and

construction of wind and photovoltaic power generation using closed tailing ponds to build photovoltaic Digitization of Management: Promote the application of various management software to realize standardized and

power projects. This not only increases the share of renewable energy in the energy structure but also refined management in multiple fields such as human resources and finance. Use digital supervision to improve

further reduces dependence on traditional fossil energy driving the green transformation of energy. management efficiency and reduce resource waste.Building a Green Manufacturing System: Build leak-free factories in the mining selection and smelting stages Digitization of Mines: Introduce digital mining management software systems establish databases and models

fully implement clean production and actively create green mines and green factories. Promote coordinated and apply geological measurement and mining coordination platforms and remote control for 8 major systems to

governance for emission reduction and carbon reduction starting from various stages of production to improve the digital level of mining optimize production processes and reduce energy consumption.achieve synergistic development of energy conservation emission reduction and environmental protection.Digitization of Dressing Plants: Promote full-process digital control of the selection plant apply various expert

control systems improve production efficiency in the selection plant and achieve energy conservation and

Implementation of Technological Upgrading consumption reduction.Applying New Technologies: Continue to promote new technologies such as tailings paste filling mining pre- Digitization of Smelting: Explore the application of cutting-edge technologies in smelters promote the application

selection waste disposal and energy-saving technology transformation for tin refining furnaces to reduce of intelligent equipment warehousing and logistics and energy management platforms enhance the automation

energy consumption from the source of production processes. informatization and intelligence level of smelters and reduce energy consumption and carbon emissions.Conducting Equipment Upgrades and Transformations: Use technologies such as variable frequency

speed control and permanent magnet synchronous direct drive to upgrade mining selection and smelting Case

The "Fuel-to-Electric" Conversion Leads Energy Conservation and Emission Reduction and Supports

equipment. Replace traditional equipment with high-efficiency low-energy-consuming equipment to

Green Development of Mines

improve equipment operation efficiency and reduce energy consumption.Improving Waste Heat (Energy) Utilization: Increase research on waste heat recovery and utilization and In 2024 facing challenges such as high energy consumption high costs and technical limitations of traditional

carry out improvements to enhance the efficiency of waste heat power generation units. This will increase fuel-powered mining trucks Hualian Zinc Indium based on previous research findings cooperated with multiple

the waste heat recovery rate and power generation efficiency while exploring carbon capture utilization parties to optimize equipment configurations and implement the "Fuel-to-Electric" Conversion— decommissioning

recycling and storage technologies in smelting enterprises to provide technical reserves for deep carbon some old fuel-powered models and promoting the large-scale use of high-tonnage pure electric rigid mining trucks.reduction. After the implementation of "Fuel-to-Electric" Conversion the comprehensive unit cost of 28 pure trolley cars was

lower than that of fuel-powered ones by 1.05 yuan/m3.km which

saved RMB 21.9056 million in transportation costs and solved

Enhancement of Comprehensive Utilization of Solid Waste the "bottleneck" of core technologies. This not only reduces the

Company's costs supports the achievement of the "carbon peaking

Deepen research and application on the "waste minimization waste valorization and environmentally sound and carbon neutrality" goals but also provides an exemplary model

management" for the treatment of solid waste. Increase the application of rock filling and tailings paste for the industry in terms of energy conservation emission reduction

Pure Electric Rigid Mining Trucks

filling in underground mines reduce waste rock removal and tailings discharge; focus on the construction and technological upgrades.of rigid landfills for hazardous waste in the smelting stage address the shortcomings in hazardous waste

disposal reduce the environmental impact of solid waste and realize the recycling of resources and energy

conservation and emission reduction. Impact Risk and Opportunity Management

Elimination of Outdated Processes and Equipment The Company has identified risks associated with extreme weather conditions such as strong winds and heavy

rainfall during the operation of open-pit mines waste dumps tailings ponds tunnels slopes construction projects

Fully review outdated processes and equipment in mining selection and smelting accelerate the power stations water and power supply lines and their ancillary facilities during the flood season. These risks

elimination of high-energy-consuming and low-efficiency motors and transformers and complete the include landslides mudslides dam breaches in tailings ponds tailings leakage damage to buildings and equipment

elimination of 545 high-energy-consuming devices to effectively reduce energy consumption and overall potentially causing company shutdowns casualties property loss and environmental pollution. To address these risks

operating costs and improve energy utilization efficiency. the Company has implemented extreme weather early warning and information reporting systems managed events

based on their impact level and established a comprehensive risk emergency response organization.

67 68Yunnan Tin Company Limited 2024 Sustainability Report

Principles for Emergency Response Case

Valorized Utilization of Gypsum Slag Opening up a New Path of Green Development

In 2024 Wenshan Zinc Indium conducted in-depth research on the raw material characteristics process

Realizing control and end-stage washing and recovery of gypsum slag and successfully developed a two-

Conducting Enforcing responsibilities self-help and stage gypsum washing system and relevant modification technology. Leveraging this technology the people-oriented and hierarchical mutual aid and Company processes industrial by-product gypsum into gypsum powder gypsum blocks and other and safe rescue accountability seeking external building materials effectively expanding the application fields of gypsum slag. This has achieved the assistance resource utilization of gypsum slag reduced its potential environmental risks decreased the need for

natural gypsum resource extraction and has positive significance for ecological and environmental

protection. What's more Wenshan Zinc Indium recovers 300 tons of zinc metal and 5 tons of indium each

year improving resource utilization efficiency and economic benefits. This also provides the industry

Metrics and Targets with a successful practical case of solid waste resource utilization and effectively promotes the green

development of the industry.The Company attaches great importance to green operations keeps close monitoring of greenhouse gas emissions

and requires all subsidiaries to track and report on their emissions.Case

Type Emissions in 2024 (tCO2e) Building Tailings Utilization Demonstration Line and Opening a New Journey for Resource Utilization

Scope 1 GHG Emissions 293910

Scope 2 GHG Emissions 1257098 Based on the large existing tailings resources and the various metals contained as well as opportunities

brought by the development of the non-ferrous metal market and mineral processing technologies

GHG Emissions Reduced due to Emission Reduction Measures 54048 the Company carried out the comprehensive utilization of the tailings pond at the shady thrust of the

GHG Emissions (Scope 1 + Scope 2) 1496960 Huangmao Mountain at the Laochang Branch in 2023 and conducted small and pilot studies after the

exploration of such resources. In 2024 a 1300 t/d industrial demonstration line was established with an

Greenhouse Gas Emissions annual production of over 400 tons of tin-rich concentrate. This project has achieved effective utilization

of tailings resources increased resource utilization rates and reduced the environmental risks associated

with tailings storage in line with national green and safe development philosophy. It provides technical

Circular Economy and management support for subsequent large-scale tailings resource extraction and helps promote sustainable development in the industry.In 2024 Yunnan Tin actively practiced the philosophy of circular economy regarded it as the key path to driving

green development improved resource utilization efficiency and achieved a win-win result in both economic and

environmental benefits. In 2024 the Company set clear goals for recycling and continuously explored innovations

in production practices. Significant achievements were made in the resource utilization of gypsum slag and tailings Ecosystem and Biodiversity Conservation

which not only effectively reduced the waste of resources and environmental risks but also provided a valuable

practical example for the industry's green and sustainable development.In the pursuit of sustainable mining development Yunnan Tin integrates the philosophy of green development

Item Objectives Descriptions Achievement throughout its mining operations formulates the Measures for the Administration of Mining Technologies (for

Trial Implementation) and standardizes the mine extraction safety management and other work to build a solid

Copper Content in 176 tons The copper slag is treated to produce copper matte which is Achieved foundation for sound development. We construct a scientific ecological management system monitor and assess Copper Matte internally supplied as a raw material for smelting. ecological impacts in real time and adjust mining strategies and protection measures accordingly. In terms of

ecological restoration we develop plans to restore ecological damage areas by means such as vegetation restoration

Recycling Goals and Achievements in 2024 and soil improvement striving to build green mines and promote green mining development.

69 70Yunnan Tin Company Limited 2024 Sustainability Report

Green Mines Green Mining

The Company strictly follows the Specification for Green Geological Survey and Mineral Exploration and other

In ecological management the Company always views safeguarding green ecology as an important mission. standards and policy requirements and comprehensively promotes green exploration. By adopting advanced

The Company plans mineral development reasonably reducing the negative impacts on ecosystems from the exploration methods such as using drilling instead of trenching and multi-porous foundation drilling the Company

source; establishes strict systems for tailings pond management ensuring safe disposal of tailings and reducing strengthens project implementation supervision and management improves exploration technology and equipment

environmental risks; actively conducts soil pollution investigations and remediation to ensure soil environmental levels ensures high-quality completion of mineral exploration objectives minimizes environmental impact while

quality; and builds a comprehensive monitoring and prevention system for geological disasters organizing hazard ensuring resource development and makes unremitting efforts to build a green mine.inspections rectification and emergency drills. Through multiple measures we promote ecological management

comprehensively and fulfill our ecological responsibility effectively. Principles of Green Mining

Green Mine Development Mode MinMinign iSnagf ety Environmental Safety Protection High Efficiency Low Consumption

Before the pre-project planning and ground disturbing activities the Company

conducts comprehensive risk assessments within the project scope along with Take comprehensive Apply efficient mining

Possess sustainable

environmental techniques and development capabilities

geological surveys to evaluate and identify high biodiversity areas and species Have good working conditions to ensure protection measures methods to improve reduce loss and dilution

impact risks. The Company works to control the impact range and mitigate mining safety to reduce the negative mechanized production rates during mining and

Development: reasonably control energy

Risk biodiversity effects continually improving ecological quality and achieving

impact of mining on the and labor productivity consumption by mining

Identification coordinated development of ecological restoration and sustainable production.environment and reduce mining costs activities

The Company prioritizes the protection and sustainable use of biodiversity. By Case

enhancing environmental protection education and awareness training for internal Mining Innovations Promote the Construction of Green Mines

Protection:

Ecological employees the Company deepens understanding and attention to ecological

Management protection at the awareness level and at the action level creating a culture of In the process of mining innovation

full participation in ecological protection. This mobilizes all employees to jointly and green mine construction the

dedicate efforts to safeguarding green ecology and advancing environmental Company is actively engaged in

Greening: protection initiatives.Restoration and upgrading mining technology and

Compensation vigorously promoting the application The Company strictly formulates and implements mining geological restoration

o f ba c k f i l l m i n i n g m e t h o d s . I n

and land reclamation plans. Through timely restoration of land and plant and

Januar y 2024 the tailings paste

animal communities the Company continuously improves the vegetation

filling system at Datun Tin Mine was

coverage rate of mines and the greening rate of factory areas enhances the carbon

successfully completed and officially

sequestration capacity of the mine's ecosystem and achieves the sustainable

put into operation which will help

development of the mine's ecosystem.the Company achieve efficient mining

while making continuous progress In January 2024 the construction project of the

towa rd s g re e n a n d s u sta i n a b l e synchronized tailing paste filling system project at

Datun Tin Mine successfully passed the inspection

development. and acceptance upon completion.Key Performance

In 2024 the Company achieved 79000 m3 of tailings paste filling and 356000 m3 of waste rock

backfill; and in 2025 the Company plans to complete 310000 m3 of tailings paste filling and 240

thousand m3 of waste rock backfill.Green Mines

71 72Yunnan Tin Company Limited 2024 Sustainability Report

Management of Tailings Ponds

In strict compliance with a series of laws and standards such as the Environmental Protection Law of the People's

Republic of China and the Regulations on the Supervision and Management of Tailings Ponds and based on Account Management

its own practices the Company formulates and implements the Measures for the Administration of Tailings

Establish an environmental management ledger for the tailings pond and implement "one

Pollution Prevention and Control and the Measures for the Administration of Tailings Pond Safety clearly defining

pond one file" management.responsibilities and standardizing processes in areas such as pollution control and safety management. In 2024 the

Company made solid progress in the safe and compliant construction of tailings ponds completed the processing of Dust Control

safety production permits for 5 tailing ponds in 3 units and promoted four tailing ponds to complete the assessment

of the second level of standardization of safety production so as to enhance the level of tailing management in all Strengthen solidification greening and watering work on the dry beaches of the tailings pond

aspects. to prevent dust from tailings. Release the ore according to the design requirements.Elimination of External Emissions

Tailings Management System Strictly prohibit tailings and tailings from being discharged to prevent pollution of the

Environmental downstream environment. Ensure proper downstream environmental monitoring and

Management prevent latent pollution after the accident if external discharge is necessary due to risks to

tailings pond safety (such as a major safety accident or during flood discharge) and promptly

report accidents (if any) to the workshop mine department and environmental protection

Water Quality Monitoring department and notify downstream residents.Conduct regular sampling and testing of water quality in the reservoir and groundwater

monitoring wells according to the monitoring plan. Prohibition of Harmful Acts

Monitoring Water Quality Monitoring

Prohibit any unit or individual from arbitrarily digging reclaiming grazing building or

engaging in any other activities that may interfere with the normal use of tailings pond facilities

and Statistics Accurately record the tailings volume to provide a basis for environmental pollution control or cause potential pollution hazards.after the closure of the tailings pond.Assessment in Flood Season Drainage Facilities

Conduct at least one comprehensive assessment and management before each flood season.Timely clear flood discharge channels and drainage ditches to keep them unobstructed;

Plan Formulation maintain stable water levels in the catchment area and regularly inspect the condition of

Formulate management plans based on the list of issues identified during the inspection and drainage and seepage facilities.in combination with daily inspection and management implement "one pond one plan" Transmission Pipeline

management define specific management measures completion timelines and follow-up

Identification management actions and eliminate pollution risks. Ensure relevant units regularly inspect the tailings transportation pipelines to prevent

and Maintenance

Management occurrences of "leakage overflow dripping and leakage".Risk Inspection of Facilities

Ensure that personnel at all levels strictly follow the dual-prevention mechanism for Backwater Pool and Backwater Pump

environmental risks to conduct daily and monthly inspections and that corrective measures Strengthen the inspection and management of the backwater pool to ensure its effective

responsible persons and timelines are in place for identified issues. operation and prevent overflow; carry out regular inspections and maintenance of the

backwater pump to guarantee 100% recycling of the backwater.

73 74Yunnan Tin Company Limited 2024 Sustainability Report

Closure of Wanlongshan Tailings Pond

Record Filling Closure of Kafang Tailings Pond The reclamation and treatment of

The Kafang Tailings Pond Closure

Ensure that the staff carefully fill in records related to the tailings pond and that the records are reservoir beach in the Wanlongshan Project was completed and accepted in

complete and accurate. Tailings Pool Closure Project was September 2024 and the reclamation and Closure of

completed in April 2024 and the

Inspection System grass planting area of the pond area was

Tailings Pond

2 reclamation and grass planting area was 427.3 thousand m .

230 thousand m2.

Establish an inspection system for workshops to conduct day-and-night inspections of the

Personnel tailings pond eliminate potential risks and ensure that no environmental pollution incidents

Management occur in the tailings pond. Case

Closure of Kafang Tailings Pond: A Solid Action to Safeguard Ecology and Safety

Familiarity with Emergency Response

Ensure the tailings pond inspectors familiarize themselves with the emergency response plan From 2021 to 2024 the Kafang Branch implemented the closure and treatment of the decommissioned

for environmental emergencies and actively participate in the rehearsal of the plan. Kafang Tailings Pond. During the period the Company organized professional personnel to conduct

comprehensive surveys and evaluations completed topographic map measurements geotechnical

engineering surveys and other preliminary tasks and developed a scientific treatment plan based on these

data. In 2024 the Company completed tailings pond treatment projects including the construction of new

drainage ditches on the surface surface leveling soil covering and grass seed planting and the removal

of blocked overflow pipes. After treatment the safety hazards of the tailings pond were eliminated

the reclamation and grass planting area reached 427.3 thousand m2 the ecological environment was

improved biodiversity increased land resources were revitalized and a successful example for tailings

pond management was provided to the industry achieving the collaborative development of safety

ecology and economy.Tailings Pollution Prevention Measures in 2024 Monitoring and Control System for Slopes and Scientific planning and precise design: From 2021 to 2024 the

Waste Dumps in Mines Company organized professionals to conduct comprehensive surveys

and evaluations of the tailings pond completed topographic map

Control of Dust Generation measurements geotechnical engineering surveys and other preliminary

Take measures such as "spraying water to work and developed a closure treatment plan based on data and terrain

reduce dust" "covering with a dustproof laying the foundation for the design of safety facilities.net" and "surrounding mineral placement Treatment of Tailings Wastewater

to ensure the moisture of the tailing Treatment Strict review and legal advancement: In January 2024 the Company Recycle all tailings wastewater in

surface" and reduce the environmental Measures invited experts organized by the Department of Emergency Management Laochang Branch Kafang Branch and

for Kafang of Yunnan Province to review the safety facility design and obtained pollution caused by dust from the tailings

Management Datun Tin Mine for production; treat Tailings approval in March to ensure the legal and compliant advancement of the pond. of In-service the remaining wastewater after reuse project.Tailings Pond in Hualian Zinc Indium and discharge Pond

Prevention of Groundwater Pollution it in compliance with environmental Efficient construction and fine management: The construction began

Take measures like "constructing leachate standards ensuring that wastewater in May 2024. To address challenges such as tight schedules and

treatment meets environmental construction during the flood season the Company cooperated with collection pools and groundwater construction design and supervision units coordinated the schedule

monitoring wells" "recycling leachate protection requirements. allocated resources and strengthened safety and quality control. The

for dust reduction in the pond area" and main project was completed in June; internal completion inspection was

"conducting groundwater monitoring conducted in July; and safety facility completion inspection was passed

as required" to effectively prevent the in September.tailings pond from polluting groundwater.

75 76Yunnan Tin Company Limited 2024 Sustainability Report

Potential Soil Pollution Hazard Identification Process

Elimination of Safety Hazards: The drainage system was optimized safety Determine key sites or key facilities and equipment for hazard identification

facilities were improved and the safety performance of the tailings pond

was enhanced enabling the tailings pond to withstand natural disasters

and unexpected impacts ensuring the safety of surrounding residents

and the Company's production. Conduct on-site inspection of potential soil pollution hazards

Treatment

Results Improvement of Ecological Environment: Grass seeds were sowed on a land of 417800 m2 vegetation coverage rate increased dust pollution

of Kafang was controlled air quality improved and biodiversity gradually enriched.Tailings Prepare potential soil pollution hazard Develop plans/suggestions for the remediation inspection report of potential soil pollution hazards

Pond Revitalization of Land Resources: Land resources were released to

promote regional economic development. This provides the industry

with a closure treatment example and enhances the industry's safety Establish archives for the identification of Implement the rectification of potential soil

and environmental protection standards. potential soil pollution hazards pollution hazards

Collaborate with the Company to organize expert technical reviews to ensure the

potential pollution hazard identification report meets filing requirements

Summarize the experience of potential soil pollution hazard identification work

File the potential soil pollution hazard identification report with environmental

authorities

Geological Disaster Control

Kafang Tailings Pond after Treatment Kafang Tailings Pond after Treatment

In 2024 in the face of the severe situation caused by geological disasters triggered by special weather the Company

organized all mines to carry out a "100-day campaign" for geological disaster hazard risk investigation and

remediation according to the Geological Disaster Emergency Response Plan . The focus was on key areas such as

Treatment of Soil Pollution mining production zones and tailings storage areas. The Company cooperated with government natural resource

departments to conduct regular patrols and inspections of 20 geological disaster and hazard points. The Company

In accordance with the Environmental Protection Law of the People's Republic of China the Law of the People's conducted publicity training and emergency drills at the Datun Tin Mine to promote disaster prevention and control

Republic of China on Prevention and Soil Pollution Prevention and Control Law of the People's Republic of China and knowledge and effectively improved the workers' ability to avoid risks and their awareness of disaster prevention

other laws and regulations the Company prepares the Potential Soil (Groundwater) Pollution Hazard Identification and reduction ensuring the safety of the mines and the life and property of the personnel.System along with inspection and monitoring plans to carry out the identification treatment and monitoring of

potential hazards and submit related reports as required. Some units have carried out monitoring identification

and report filing for toxic and hazardous substances with multiple approaches to effectively control soil pollution

and actively protect the soil ecological environment.Thermal Imaging Map of Geological Disaster Measurement Robot for Geological Disaster

Emergency Drill by Drone Online Monitoring System

77 78Yunnan Tin Company Limited 2024 Sustainability Report

Key Performance Case

Ecological Restoration in Mining Areas Creates a New Green Landscape

In 2024 the Company conducted 22 geological disaster patrols and inspections proposed 47 remedial measures

and suggestions submitted the comprehensive geological disaster hazard investigation records 12 times prepared The Company actively promotes ecological restoration at multiple waste dumps and slopes involving

several areas in Laochang Branch Kafang Branch Datun Tin Mine and Hualian Zinc Indium. The ecology

the Report on the Geological Disaster Hazard Risk Inspection and Identification for the Mining Area in Response to of the site has been effectively restored through site levelling clean-up demolition of old buildings and

Typhoon Yagi and supervised mine units to conduct four single-point emergency drills. hardening of the ground mulching planting of trees shrubs and lianas as well as sowing of ryegrass

seeds and subsequent monitoring and management efforts. After restoration vegetation coverage at

each site has significantly increased soil erosion has notably decreased and the regional ecological

Ecological Restoration environment has been significantly improved creating suitable habitats for surrounding wildlife and

promoting ecological balance.On the path of practicing sustainable development the Company attaches great importance to ecological

restoration and biodiversity conservation and strictly follows the Kunming-Montreal Global Biodiversity Framework

the sustainability standards of International Finance Corporation (IFC) and the Convention on Biological Diversity

striving to achieve the goals of biodiversity conservation and sustainable use by 2030.In 2024 the Company formulated the Measures for the Administration of Mining Ecological Restoration

Implementation (for Trial Implementation) and each mine developed a "one mine one policy" remediation plan

based on their actual needs. Through measures such as soil covering and vegetation greening the Company is fully

promoting the ecological restoration of historical slag heaps tailings ponds and abandoned mines to promote the

accelerated development of mining ecological construction.Case

Ecological Restoration of Iron-Sintered Ball Slag Dump to Fulfill the Responsibility in Green Development

In 2024 Tin Branch carried out ecological restoration at the iron-sintered ball slag dump. The Company 16# Waste Rock Yard of Datun Tin Mine 1820# Waste Dump of Kafang Branch

entrusted a professional organization to test the soil prepare feasibility studies and implementation

plans and organize expert reviews; the site management included slope restoration soil covering and

determining the direction of forest restoration. A combination of trees and grass was used for greening

planting and sowing camphor trees Bermuda grass and clover with subsequent care and management.A total of RMB 1.3914 million was invested in the project effectively preventing geological disasters

controlling soil erosion increasing vegetation coverage restoring soil functions and providing support for

the Company's sustainable development.Soil-restored Iron-Sintered Ball Slag Dump Re-greening and Reclamation of Mining Area

79 80Yunnan Tin Company Limited 2024 Sustainability Report

Key Performance Optimization Measures for Mineral Resource Utilization in 2024

In 2024 the Company set a target of completing 91 hectares of mining ecological reclamation but actually completed

Establish a development pattern of "One Center Three Platforms Four Slopes Five Shafts

110.39 hectares of ecological restoration achieving 121% of the target; and in 2025 the Company plans to Three Areas Three Plants Four Mines": "One Center" refers to the central hub of the mining

area. "Three Platforms" represent three multifunctional platforms each with specific

complete 97 hectares of mining ecological reclamation. responsibilities. "Four Slopes" are the four inclined tunnels extending to each production

Reshaping area designed to enhance working conditions and efficiency. "Five Shafts" refer to the five

Currently the Company has completed a total of 748.63 hectares of mining ecological restoration. the Resource ventilation shafts distributed across the production areas to mitigate air pollution and

Development optimize airflow. "Three Areas" describe the establishment of 3 production support systems

Pattern aiming to intensify operations while achieving energy conservation and emission reduction."Three Plants" are three large modern flotation plants consolidating the original 14 smaller

plants to optimize mining and beneficiation capacity. "Four Mines" refer to four mining

Protection of Mineral Resources operations that replace the previous 26 streamlining the allocation of mining resources.Mineral resources are the key to the survival and sustainable development of the Company. Yunnan Tin actively

fulfills its responsibility for resource protection by expanding the resource scale through geological exploration

Preparing Prepare the mining (stripping) technical plan for each mine in advance every year and follow optimizes mining and beneficiation indicators to improve resource utilization efficiency and advances resource the principle of "synchronizing mining (stripping) and prioritizing tunneling (stripping)"

protection through a dual approach of "increasing supply" and "reducing waste". In the mining production process Scientific Mining to ensure a balance of three-level mining volume and coordinate current production with

the Company accelerates mining site construction ensures proper mine site replacement guarantees the balance Plans sustainable development

of the three-level mineral volume and enhances production capacity. In terms of beneficiation the Company

focuses on full-load production researches technological transformations reasonably allocates ore types improves

technical and economic indicators enhances comprehensive resource utilization and strengthens the supply of self-

produced raw materials continuously consolidating the results of resource protection. Optimizing

Geological Study the geological factors controlling mineralization conduct mineralization predictions

Research and prospect in underexplored areas; strengthen the approach of "searching for potential

and

Exploration mineral sources by exploring the surrounding or adjacent areas of an existing ore and Mineral Resource Protection Mechanism exploring the boundary of a known ore body to understand specific characteristics including

the bottom or edge" to improve the control over exploration.Increasing Supply Reducing Waste

The Company has formulated related regulations With daily coordination meetings as a tool and Improving Exploration Make proper exploration and mining deployments strengthen exploration of the upper and

such as the Measures for the Administration of specialized meetings as an entry point the Deployment central systems; and based on mining conditions conduct backfilling and selective mining to

Mineral Resource Reserves of Yunnan Tin Co. Company gradually reconstructs the mining and improve resource utilization.Ltd. the Measures for the Administration of production scheduling management system Utilization Rate

Geological Exploration (Survey) of Yunnan Tin Co. promptly corrects and resolves issues arising

Ltd. covering the entire process from geological during production such as mining loss rate

exploration resource expansion upgrading and ore depletion rate and beneficiation recovery

densification to consumption and eventual rate continuously improving production Advancing

mining. operations and resource utilization quality. Comprehensive Emphasize integrated mining exploration evaluation and utilization; and evolve from single Development

and Utilization tin metal development to the recovery of more than ten beneficial components.

81 82Yunnan Tin Company Limited Tin Branch Company Chung Yeung Festival to honor the 2e0l2d4e Srulyst asiynmabpilaityth Ryeport

03

Shaping a Prosperous Future Centered

around Social Contribution Innovation-Driven Development 「"a Topic of Double Materiality"」

Yunnan Tin always adheres to the core philosophy of innovation-driven development responsibility fulfillment and win- Product and Service Safety and Quality 「"a Topic of Double Materiality"」

win cooperation striving to play an active role in the broad stage of social development. The Company understands that the Data Security and Customer Privacy Protection

success of an enterprise comes not only from the creation of economic value but also from its contributions to and promotion

of social welfare. Therefore we place great importance on the safety and quality of our products and services seeing them as Supply Chain Due Diligence「"a Topic of Double Materiality""a Topic of Double Materiality"」

the cornerstone of our survival and development; and we uphold data security and customer privacy protection with customer

trust as our highest principle. In supply chain management we make every effort to safeguard the security and stability of the Employees

supply chain and ensure that each link operates efficiently and sustainably. We value the contributions and growth of each

employee and strive to create a work environment full of care and opportunities enabling both employees and the Company Social Contribution

to grow together. In addition the Company actively participates in social contributions and rural revitalization efforts creating Rural Revitalization

more value for society and making a greater contribution to a sustainable future.Industry Co-construction

83 84Yunnan Tin Company Limited 2024 Sustainability Report

Innovation-Driven Development Project Full-Process Management「"a Topic of Double Materiality"」

Conduct comprehensive management supervision and guidance services for the Company's technological

work. Specifically organize coordinate and inspect the approval contract signing and implementation

Governance project execution and acceptance at different stages of the technology plan and ensure that scientific and

technological projects proceed in a standardized and orderly manner. Organize the preliminary technical

Yunnan Tin deeply understands that innovation is the core driving force for development. The Company practices the demonstration and evaluation of major technology introduction and renovation projects as well as the

new development philosophy firmly focuses on aligning the innovation chain with the industrial chain promotes the organization and management of awards and evaluations for key technological breakthrough projects and

development of new quality productive forces fully implements the innovation-driven development strategy and safeguard the technical feasibility of the projects and the fairness of the award review.vigorously advances technological innovation efforts. The Company has formulated the Measures for the Administration

of Science and Technology Work based on national major policies and guidelines. We continuously increase investment Technology Resources and Achievement Management

in scientific research to provide solid financial support for innovation; actively recruit talented individuals to gather Manage the Company's science and technology statistics and archives organize performance evaluations

innovative wisdom; and expand external cooperation to absorb diverse innovation resources. We also focus on solving and assessments of scientific and technological activities and provide data support and performance basis

key core technologies breaking through development bottlenecks accelerating the transformation of scientific and for the Company's scientific and technological decision-making. Conduct daily management of scientific and

technological achievements and strengthening the foundation of innovation from multiple dimensions. technological achievements and patents establish patent work systems guide coordinate and inspect the

patent work of affiliated units balance the total number of patents and manage the patent ledger organize

and recommend science and technology award reviews and promote the transformation of scientific and

Key Honors technological achievements and intellectual property protection.In 2024 Hualian Zinc Indium was recognized as a national high-tech enterprise; Wenshan Zinc Indium was selected as Technology Resource Coordination and External Communication

one of the sixth batch of National "Little Giant" Specialized and Sophisticated Enterprise that Produces Novel and Unique

Products; the "Digital and Intelligent Factory" of Tin Branch was selected as an excellent case for the "Digital China" Coordinate and manage science and technology innovation platforms and other technological resources of

Construction Summit and became a key support project for the "Lighthouse Factories" initiative in Yunnan Province. the Company and its affiliated units and promote resource sharing and efficient utilization. Organize external

scientific and technological exchange activities strengthen the Company's connections and cooperation with

external research institutions and enterprises enhance the Company's technological influence and introduce

external resources and advanced philosophies for the Company's technological innovation.Through Continuous Deepening of Technological Management

Reforms the Company's Innovation and R&D System Has Been

Further Improved.Optimizing Innovation Management Improving System to

Structure Encourage Innovation

Strengthen top-level design clarify the functional positioning of Improve the incentive mechanism

Main Management Responsibilities of Technology Work the decision-making management and execution levels and revise the reward system and improve

enhance the macro management and coordination ability of relevant systems such as the evaluation

Policy Planning and Incentives technological innovation work. criteria for technological innovation.Stimulate innovation vitality and

Implement the Party and national science and technology policies carry out the Company's technological Improve the technology management structure at the grassroots provide a solid institutional guarantee

innovation strategy and draft technology innovation incentive policies to create a favorable policy level achieve full coverage of technology management functions for the construction of the innovation

environment for the Company's technological innovation. Organize research and prepare medium- and long- establish a layered management model with complementary and RD system.term science and technology development plans and implementation measures as well as annual science advantages and solidify the management foundation for

and technology plans and budget preparation to provide strategic guidance and resource support for the innovation and R&D.Company's technological development.

85 86Yunnan Tin Company Limited 2024 Sustainability Report

"Reconstruction and Continuous Mining C onduct research on the collaborative

Integrating Resources to Drive Strengthening Standard and Patent Technology for Pillar Re-creation in Gently development of rail and trackless mining

Innovation Layout Inclined Thick Ore Bodies": Improve the define reasonable intervals and operating

production capacity mining efficiency and methods and create a collaborative

U se technologies as a link and projects as a Incorporate standards and patents into the entire recovery rate of the mining field and allow the development pattern that not only

carrier optimize the allocation of technological process of technology reserve project R&D previously difficult-to-use low-grade dead ore reduces safety risks improves working

resource elements and consolidate the strength achievement transformation and application to be developed and utilized thus expanding environments and conditions but

of all parties. Create a comprehensive innovation promotion and treat them as key elements and the range of available resources. also enhances the quality of economic

system covering technological R&D achievement indicators of technological innovation work to operations to lay the foundation for a

transformation talent cultivation and open enhance the Company's independent innovation "Comprehensive Technology for Intensive strategic shift to trackless mining.cooperation and provide sustained momentum capability. Mining of Low-Grade Thin Ore Bodies":

for innovation and R&D. Effectively solve the problem of using trackless

equipment for mining low-grade thin ore

bodies improve production efficiency reduce

costs revitalize low-grade resources and

The Company has established a comprehensive and highly incentivizing innovation mechanism. In terms enhance resource utilization value.of evaluation the quantity of patent authorizations and the application of the patent system are important

performance assessment criteria for the technological activities of each subsidiary; in terms of rewards "Deep Hole Combined Mining and Subsequent

inventors of authorized job-related invention patents are given one-time rewards motivating employees Fill ing Method for Gently Inclined Multi- Promoting

to actively engage in innovative practices and improving the Company's overall innovation strength and layer Loose and Broken Ore Bodies": Achieve Production

intellectual property reserve. integrated innovation in mining processes Mode Upgrades

further increase production capacity while

improving mining efficiency and optimize

mining operation processes.Strategy Revolutionizing

Mining Methods

Technological Innovation Digitalization Construction

In 2024 the Company used the three-year action plan for technology-driven efficiency as a key focus to In 2024 the Company actively advanced digital construction closely followed the digital cloud tin model "One

deeply promote the integration of the innovation chain with the industrial chain continuously increasing Map Two Lines" for overall layout and phased implementation and made significant progress in several key

investment in R&D and implemented 37 Class-1 technology projects and 197 Class-2 technology projects. areas: The integration of business and financial digitization across the tin industry chain centered on ERP

The implementation of a series of key technology development projects such as the Research on the has been comprehensively improved while the digital manufacturing system led by the MES management

Optimization of the Pre-crushing and Waste Discarding Process for Oxidized Ore System the Research on the system has been gradually established. The connection between ERP and MES allows "digital intelligence" to

Localization of 125 t-135 t Hydraulic Backhoe Excavators the Research on the Secondary Safe and Efficient be integrated into key production processes with the CNC rate of key equipment in major processes reaching

Mining Technology for Old Resources under Complex Geological Conditions in the East Area of Gejiu and the 75.23% achieving an intelligent upgrade from "manual control" to "digital control". We achieve the integration

Research and Application of Electric Furnace Smelting Technology for Tin Polymetallic Materials has laid the of the office network and control network establish an intelligent dispatch center and data center; build various

foundation for the enhancement of the Company's technological innovation capabilities. The Company has monitoring and remote control systems create a 3D visualization platform and strengthen safety control and

collaborated with Kunming University of Science and Technology to establish the Yunnan Tin Sub-center of the energy management. Moreover we also enable information systems to realize remote monitoring of equipment

National Engineering Research Center of Vacuum Metallurgy. We are fully committed to creating a technological and data sharing; build a private cloud data center apply multiple business systems and improve production

innovation hub in the field of non-ferrous metal metallurgy. efficiency and management levels.

87 88Yunnan Tin Company Limited 2024 Sustainability Report

Some Digital Management Systems

Unit Intelligent Mine Construction Goals Operation Results

ERP System A unified transmission network and the

To complete the construction of the "One Network"

integration of the office network and control

· S upported by an advanced technology platform and combined with the Company's needs the ERP system which involves hundreds of kilometers of optical

network have been realized improving the

realizes vertical integration horizontal integration enhanced control and real-time insights strongly cables over 70 core devices and more than 1000

reliability of the information technology

supporting the Company's operational management. access terminals.infrastructure.· In financial management the system significantly reduces manual voucher entry improves financial work

and settlement efficiency optimizes report generation processes and reduces overdue accounts receivable; Datun Tin To use automation and remote control Unmanned operation has been realized

in procurement management it optimizes business processes improves work efficiency shortens Mine technologies to build a standardized data center in production auxiliary systems such as

procurement cycles and reduces procurement costs; in inventory management it shortens inventory and an intelligent integrated dispatch command compressed air ventilation water supply and

turnover days and reduces inventory waste and transportation costs. center. high-voltage power supply and distribution.To take the Mining Execution System (MES)

Mining MES System Collaborative Control Platform The full-process management of production platform at the core and fully promote the

operations has been realized.construction of a digital mine.· T he platform builds an information control system based on the "Platform + Application" model develops

multiple mining-specific configuration tools and creates a highly configurable digital mining development

To successfully build an energy consumption online

application platform.monitoring platform safety control platform and The remote control of underground

· It has core functions such as data collection and modeling analysis and can realize the automation other equipment control layer systems as well as ventilation fans water pumps and other

structuring and standardization of data management providing reliable data support for production a centralized power control system remote control equipment has been realized.decision-making. system for air compressors etc.Laochang To initially build a 3D visualization integrated The remote visual supervision of mine safety

Indium on Cloud MES Platform Branch control platform. production has been realized.· T he platform builds a system module ecosystem focuses on solving the problems of decentralized The branch has realized the positioning and

traditional enterprise information systems inconsistent data and low management efficiency and achieves To build underground "three major safety" communication of underground personnel

seamless integration with overall business related to information systems. In core business it achieves systems slag slope online monitoring system and and the monitoring of toxic and harmful

full industry chain coordination from mining selection inspection to sales effectively avoiding operation tailings pond online monitoring system. gases slag slope and pit wall displacement

separation and data distortion issues. and tailings pond safety.· The platform breaks down barriers between various links in the industry chain initially realizes "one system

managing production" and gradually builds into a personalized integrated multi-business management To build systems such as the 2000 t single copper

system significantly improving the Company's management efficiency and operational efficiency. flotation machine liquid level automatic control

crushing system intelligent management of truck The remote monitoring and intelligent

scales electricity consumption data collection control of production equipment have been

Tin Smelting MES System unmanned power station unmanned backwater achieved improving production efficiency.Kafang system pump station and remote centralized

Branch

· T he system is a core component of the key technology R&D project for intelligent production lines in tin control of fans.smelting based on the industrial internet.To establish "three major" systems for

· S elected as a typical case for digital transformation by the China Association for Public Companies the Strong support has been provided for mine underground safety and an online monitoring

system is awarded the Excellent Case of "Digital Transformation of Listed Companies" by Securities Daily. safety production.system for tailings ponds.

89 90Yunnan Tin Company Limited 2024 Sustainability Report

Case

Unit Intelligent Mine Construction Goals Operation Results 5G Empowers Intelligent Smelting and Leads the Industry's Digital Transformation

To establish a private cloud data center and

In 2024 Tin Branch devoted itself to building the "5G+Cloud Tin Intelligent Smelting Plant" to deeply

achieve full fiber optic coverage of the basic The centralized data management and

advance the digital transformation of manufacturing and further enhance the Company's production

communication network across the entire efficient transmission have been realized.efficiency and management reform. The Tin Smelting Intelligent Manufacturing Demonstration Factory

company.Project (Phase I) was selected as one of "Lighthouse Factories" supported by the 2024 Yunnan Provincial

Manufacturing High-Quality Development Special Fund. The "Indium on Cloud MES Platform" won the

The intelligent control and optimized Best Practice Award for Digital Transformation by the China Association for Public Companies providing a

scheduling of the production process

To build the MES integrated business information model for the industry's digital and green transformation.have been realized improving production

platform open-pit mining truck scheduling system

efficiency and safety management levels

etc.with an expected 500% increase in production Key Performance

measurement and statistics efficiency.Tin Branch's "5G+Cloud Tin Intelligent Smelting

Hualian The integration and sharing of data in Factory" was selected as one of the 30 national

Zinc areas such as mining production quality excellent cases for the 2023 Digital and Green

Indium inspection sales cost equipment inventory Collaborative Transformation Development and

personnel and payroll have been mostly one of the 57 provincial excellent cases for 2023

completed and the data can be mined becoming a key showcase at the 2024 "Digital China"

To realize data integration and sharing. and analyzed according to management's Construction Summit to highlight the achievements

requirements. Over 80 business analysis in digitalization and intelligence in tin smelting.reports are automatically generated with

report efficiency transitioning from the

traditional manual mode to real-time In November 2024 four technological projects of

automatic generation and sharing. Tin Branch won the Technology Progress Award

for Yunnan Tin Group Holding Co. Ltd.The remote startup monitoring control and

To expand the coverage of the DCS Automation shutdown of equipment have been realized

Control System. effectively improving equipment operating

efficiency and production metrics.Construction of Intelligent Mines by Branches (Subsidiaries) in 2024

The "Indium on Cloud MES Platform" was The "First Global Unmanned Tin Refining System

recognized as the "Best Practice Model Case" of Based on 5G+AI Technology" project won the

the (Third) 2024 Digital Transformation of Listed second prize at the 7th "Blossom Cup" 5G

Companies in China. Application Collection Competition.

91 92Yunnan Tin Company Limited 2024 Sustainability Report

Case

5G Empowers Intelligent Warehousing of Tin Ingot and Drives Efficient Transformation and Development

The Company addressing the issues of heavy reliance on manual labor low efficiency high safety risks and

insufficient informatization in the tin ingot storage and logistics process has built an intelligent tin ingot

warehousing system. This system automates the entire process of tin stack offline transfer storage outbound

and loading along with intelligent equipment scheduling and information management and enables data

interaction with the existing production control system. The construction of the intelligent warehousing system

not only improves the Company's production efficiency reduces costs and enhances competitiveness but

also provides a model for the intelligent transformation of storage in the non-ferrous metal industry promoting

the industry's development toward digitalization automation and intelligence. It has a positive significance

for optimizing industry supply chain management and improving overall operational levels. Intelligent Warehousing System Contributing to Efficient Operations

Intelligent Warehousing Construction and Results

5G Intelligent Warehousing

Impact Risk and Opportunity Management

Storage Planning and Function Implementation Data Interaction and Software Management

In the technology-driven development process the Company has keenly realized the critical importance of risk

management for innovation activities. To ensure the sound promotion of technological innovation effective

protection of R&D achievements and smooth and safe technology transactions the Company has constructed a

3000t + Buffer Full-process Expansion WCS Equipment WMS Integrated

Storage Automated of Loading Scheduling Information complete and detailed intellectual property management system.Design Management Functions Management Management

Intellectual Property Management System

Storage Production Precise Improvement Efficient Precise Full-Process Management of

Capacity Efficiency Inventory of Loading Equipment Technological Innovation Classified Protection of R&D ResultsData

Assurance Improvement Management Efficiency Coordination Support

· Analysis for Novelty Search · Standardization of Patent Application

· R&D Tracking and Protection · Management of Trade Secrets

Reducing quality defects by 20%; improving

Increasing tin ingot warehousing efficiency by more

data integrity by more than 20%; lowering

than 80%; improving inventory counting efficiency

equipment maintenance costs by more than 5%; Risk Prevention and Control of Technology Infringement Response and Contract

by 30%; raising inventory accuracy rate by 15%;

raising labor productivity by more than 10%; Transactions Management

enhancing individual performance by 10%; reducing

increasing the product capacity and process data

energy consumption by more than 3%. · R eview for Technology Introduction · Infringement Response Mechanism

management informatization level by 15%.· Review for Export and Construction · Improvement of Contract Clauses

· Review of Joint Venture and Cooperation

Providing precise decision-making production basis for

enterprise production; improving management's rapid

response ability and reducing enterprise costs.

93 94Yunnan Tin Company Limited 2024 Sustainability Report

Metrics and Targets Product and Service Safety and Quality

「"a Topic of Double Materiality"」

The Company encourages various types of innovation respects intellectual achievements focuses on protecting

intellectual property and continuously invests resources in innovation. As an key player in the industry the Company understands that ensuring the high-standard safety and excellent quality

of products and services is not only a key manifestation of fulfilling corporate social responsibility but also an important

In 2024 the Company was granted 52 new patents including 20 invention patents and 32 utility model patents and cornerstone for driving steady business growth and enhancing market competitiveness. The Company has established a

awarded a patent bonus of RMB 118 thousand. By the strict quality management system to ensure product quality while using continuous improvement as the driving force to

end of 2024 the Company had held 374 valid patents continuously enhance service quality meet and exceed customer expectations and achieve sustainable development.including 110 invention patents and 264 utility model 40000 39747

patents.In 2024 the Company organized and implemented 37 30000 27257 Quality Management

first-class science and technology projects 197 second- 24548

class science and technology projects and won 2 20000 Governance

provincial and ministerial-level science and technology

awards. Quality is a key element of core competitiveness and the cornerstone of business development. Yunnan Tin actively

10000

In 2024 the Company's R&D investment was RMB 397.48 responds to and fully implements a series of plans such as the Three-Year Quality Improvement Action Plan . We

million an increase of 61.92% on a year-on-year basis. also have developed a series of systems including the Quality Environment Occupational Health and Safety and

In the future the Company will continue to increase - Energy Management Manual the Quality Management Regulations the Standardization Management Measures and 2022 2023 2024

its investment in R&D ensuring that the ratio of R&D the Quality Management Assessment Measures to strengthen the effective operation of the quality management

investment to main business revenue remains above 2%. R&D Investment in the Last Three Years system. Additionally the Company relies on intelligent factories and intelligent enterprise construction to establish

(RMB 10000) an MES quality module achieving mechanized automated and information-based control of quality inspection

comprehensively improving the level of quality management.公司知识产权管理体系

Integrity

Excellence Adherence People Energy Green

Pursuit Law Orientation Conservation Development

Compliance Low Carbon

Quality Management System Certification

95 96Yunnan Tin Company Limited 2024 Sustainability Report

Promoting Data-Driven Quality Improvement Improving All Employees' Quality

and Goal Optimization Management Awareness

· Quality and metrology management ledgers were · The Company focused on customer needs

established to collect and analyze monthly data in and integrated quality philosophy into

aspects such as product and process quality raw the production process. Employees' skills

and auxiliary material quality customer complaints and quality awareness were improved

product delivery inspection quality control pass rate through activities such as skill competitions

and incorporate data into performance evaluations. knowledge sharing QC team activities and

Corrective actions for non-conformity were formulated team building to provide support for quality

The Company's subsidiaries including Tin Branch Hualian Zinc Indium and Datun Tin Mine based on the analysis results to promote stable management.have passed CNAS certification. improvement in product quality throughout the

production management process.Strategy · Q uality objectives were reviewed and revised based

on data and actual conditions to ensure that product

quality remains stable and reliable align with market

In 2024 the Company implemented a series of comprehensive and systematic measures centered around quality demand and the Company's development strategy and

management aiming to improve product quality meet customer needs and achieve the Company's quality and safeguard the achievement of the Company's quality

business objectives. and business Goals.Key Optimization Measures for Quality Management in 2024

Improving the Quality Management Strengthening Quality Process

Responsibility System Control

· T he Company implemented the system holding the · Comprehensive testing and monitoring were Case Iron Ore Desulfurization and Quality Upgrade Unlocked New Value of Existing Resources

responsible persons and the Chief Quality Officer conducted from production materials to

accountable for product quality and safety. Through final products. Based on the PDCA process

standardized documents such as the System Manual and risk points were identified workflows were In 2024 Hualian Zinc Indium launched desulfurization and quality improvement technological upgrades

the Process Procedure the quality responsibilities and streamlined and scientific management for iron ore. Faced with the situation where the increase in the iron grade of the raw ore led to higher tin

objectives at each level are clearly defined. systems and operational mechanisms were content and a significant loss of tin in the iron concentrate the Company explored and adopted magnetic

established. pyrite activators and efficient collectors. By combining fine grinding flotation and magnetic separation

· Each department and subsidiary broke down quality processes the Company achieved efficient mineral separation. After the improvements the iron content

responsibilities and objectives to the grassroots level · P rocess product quality indicators for and sulfur content of the iron concentrate after weak magnetic separation increased while the tin and

while establishing an assessment mechanism and a the smelting production process were arsenic content decreased. Some tin metal in the tailings could be re-selected and the product quality

performance management system with grape charts. determined and inspections were organized was significantly improved. Resource utilization was enhanced and the market competitiveness of the

Regular supervision assessment and enforcement in comparison with third-party quality product was strengthened providing a reference example for quality and efficiency improvement in the

of rewards and penalties ensured the effective inspection agencies to improve inspection mining industry.implementation of quality responsibilities. and analysis quality.

97 98Yunnan Tin Company Limited 2024 Sustainability Report

Case Case

Multiple Measures were taken to Improve Cathode Copper Quality and Created a New High in the Industry Diverse Training Empowered and Improved Employees' Quality Management Awareness

In 2024 the Company established a quality improvement team. Through initiatives such as improving In 2024 the Company actively carried out diversified training activities to improve its quality management

co-line production optimizing the electrolyte circulation process introducing advanced equipment level. Training sessions were organized on aspects of basic quality management knowledge technical

and conducting regular maintenance to promote equipment upgrades organizing multi-level employee reinforcement and safety knowledge covering fields such as quality management systems quality control

training on product quality improving the quality control system strictly controlling raw material quality methods and more. Various specialized training activities were held including internal audit training for

and increasing inspection frequency the Company actively worked to enhance the quality of cathode quality and environmental systems metrology knowledge training and more with a series of Quality

copper products. In 2024 the Company's cathode copper product quality was significantly improved with Month activities held in September. Employees were also encouraged to participate in the national

the A-grade copper product rate rising from 93.9% to 99.25% customer satisfaction reaching 100% and quality management knowledge competition. Through these trainings employees' quality awareness

the economic benefits increased significantly. This not only enhanced the Company's competitiveness and professional skills were significantly enhanced laying a talent foundation for ensuring product and

but also provided high-quality raw materials to downstream industries helping to drive technological service quality and improving the overall competitiveness of the Company.progress and quality improvement in the industry.Cathode Copper Equipment Upgrades Cathode Copper Equipment Upgrades

Training on Product Quality

Promotion and Training for the Quality Month Event

Key Performance

In 2024 the Company offered 6 quality training sessions with a total of 10 725 person-times of

Cathode Copper Process Optimization participants.

99 100Yunnan Tin Company Limited 2024 Sustainability Report

Case Key Honors

QC Team Activities Empowered and Created a New Height in Quality Management

In February 2024 the Shanghai Futures Exchange announced that the "YT" zinc ingot (ZN99.995) produced by

In 2024 the Company launched the Quality Management (QC) Team initiative encouraging departments Wenshan Zinc Indium had been registered with the Shanghai Futures Exchange. Meanwhile our tin ingots received

and units to autonomously form QC teams and adopt quality management improvement techniques and the China Four-Star User Satisfaction Product Certificate while copper cathodes and zinc ingots received the China

statistical analysis methods to address quality and cost issues in the production and operation process and Three-Star User Satisfaction Product Certificate.adopted the PDCA method to carry out activities. In 2024 the QC team initiative proceeded smoothly with

a success rate of over 80% creating annual benefits of more than RMB 30 million. Some QC results were

selected as typical industry cases for publicity purpose. This initiative helped us improve product and service

quality enhance core competitiveness and establish a good brand image providing a successful example for

industry quality management.Key Honors

The Products of the Company Were Awarded the "User Satisfaction

Certificate" by the China Association for Quality

The Company's QC Teams and Units Received Provincial Industrial and

Even National Recognition in 2024

101 102Yunnan Tin Company Limited 2024 Sustainability Report

Based on systems such as the Non-conforming Product Management Process the Customer Complaint Handling Case

Process (for Trial Implementation) the Measures for the Administration of Product Return (Replacement) the Efficient Handling of Quality Complaints Maintained the Company's Reputation

Company clearly defines the management organization responsibilities and processing procedures for product

returns and recalls and establishes a quality complaint management system. This ensures that when products In August 2024 after receiving a quality complaint regarding tin ingot products the Company's Quality

are returned or recalled due to quality packaging market or other reasons we can handle customer complaints Supervision Department took immediate action. Through investigating production and inspection

efficiently take legal liability for quality damage compensation protect customers' rights and interests and records retesting retained samples and other methods of self-checking the issue was initially identified

safeguard the reputation of the Company. as possibly related to the customer's testing methods. After multiple communications with the customer

the professionals proposed a solution to lend the branch's standard samples to the customer for

Quality Complaint Management System simultaneous testing. Ultimately the customer confirmed that the product quality was fine withdrew

the return request and returned the standard samples. This handling effectively resolved the customer's

concerns protected the Company's reputation avoided economic loss and demonstrated the Company's

Classified Handling Quick Response commitment to product quality and efficient complaint handling capabilities.of Complaints Communication and Handling

Customer complaints are classified into Once a customer complaint occurs the sales Impact Risk and Opportunity Management

general complaints important complaints unit promptly feeds the customer's claim back

and major complaints and targeted handling to the production unit. Yunnan Tin deeply recognizes the importance of product quality risk management. To effectively respond to potential

strategies have been developed accordingly. risks and protect product quality and brand reputation the Company has established a quality management system

covering the entire product lifecycle from raw material procurement and production processing to after-sales services.From the four dimensions of "Plan - Implement - Check - Improve" the Company systematically identifies and strictly

The production unit immediately organizes controls risk points during implementation striving to provide customers with products of excellent quality and reliable

relevant personnel for self-inspection checks safety thereby laying a solid quality foundation to support the Company's steady progress in the market.and analysis and comprehensively identifies

Sales units production units and the market the root cause of the problem.operations center are responsible for handling Product Lifecycle Quality Management System

complaints against their respective units

or organizations according to the relevant Raw Material and Auxiliary Material Management

regulations. Upon receiving a complaint they Through reply letters phone calls remote

promptly contact the relevant responsible online meetings and other methods the By formulating the Measures for the Administration of Raw Material Acceptance and the List of Key Materials

person to cooperate and handle the complaint Company maintains close communication and Execution Standards the Company clearly defines the quality requirements and acceptance standards for

ensuring clear responsibility and efficiency in with the customer provides explanations raw materials and production auxiliaries controlling product quality from the source.the complaint handling process. and promptly updates the customer on

the progress and results of the handling

improving customer satisfaction.Production Process Management

The Company identifies the key processes and quality control points in the production process and formulates

the Work Instructions and the Operating Procedures to precisely control the technical parameters of production

processes product quality standards and qualification rates. Moreover the Company has established a system

for monthly workshop checks quarterly department checks and annual company-wide checks to ensure the

stability of quality in the production process.

103 104Yunnan Tin Company Limited 2024 Sustainability Report

Quality Inspection and Non-conforming Product Handling Key Performance

The Quality Supervision Department is responsible for sampling testing and evaluation of raw materials

intermediates and finished products. In accordance with the Measures for the Administration of Non-conforming In 2024 the Company entrusted a third party to conduct a customer satisfaction survey on tin ingots cathode

Products all non-conforming raw materials intermediates and products are isolated labeled recorded and copper and zinc ingot products achieving a comprehensive satisfaction score of 97.19.properly disposed of to prevent them from entering subsequent processes or being used for unintended delivery.Ex-factory and After-sales Management

Key Honors

Product inspection before delivery follows internal control standards that are stricter than national

standards to ensure that only high-quality products are delivered to customers. After delivery the

Company continuously monitors product usage and customer experience. Through visits surveys

phone communication and satisfaction surveys the Company collects customer feedbacks and needs to

continuously improve product quality.Goals and Indicators

The Company strictly controls product and service quality and values product and service quality as a core

competitive advantage.Objectives Achievement

Smelting Process Product Quality

Qualification Rate ≥ 91% The Smelting Process Product Quality Qualification Rate was 97.04% The Company Received the Excellent Contribution Award for Outstanding Supply Chain

Smelting Product Internal Control Partner from Customers.Qualification Rate >97% The Smelting Product Internal Control Qualification Rate was 99.91%

Major Equipment Integrity Rate

>97% The Major Equipment Integrity Rate was 99.95% Customer Complaint Handling Process

National Sampling Product Pass The Product Factory Pass Rate was 100%; and the National Sampling

Rate = 100% Product Pass Rate was 100%

Customer Dispute Resolution Rate The Customer Dispute Resolution Rate was 100% 0 major quality Accept complaints fill out Provide feedback on Give feedback on

= 100% complaint occurred and the Product Recall Rate was 0% Receive customer work orders and record specific situations and specific situations and

complaint information customer feedback issues coordinate internally coordinate cross-unit

Quality Goals and Achievements in 2024 and requirements within the unit handling

Customer Service Accept complaints Provide feedback

Analyze causes and offer Analyze and process record customer to relevant units or

solutions issues feedbacks and departments based on

Guided by the principle of "providing first-class service quality for customers" the Company provides tin ingot requirements complaint content

bundling or retail service based on customer demands. For customers purchasing our tin ingots we offer them

supporting services for copper indium zinc and silver raw materials and products. To improve after-sales service

the Company has developed a Customer Complaint Handling Process to classify complaints into general important

and major complaints for targeted handling. Sales Units Production Units and the Market Operation Center are Documentation Follow up with customers

responsible for handling complaints raised against them respectively and collaborating with relevant persons in

charge to resolve problems and improve customer satisfaction.

105 106Yunnan Tin Company Limited 2024 Sustainability Report

Data Security and Customer Privacy Protection Regulations on Data Security Management

In recent years the Company has effectively utilized digital technology to improve production and operational Each unit shall manage its data assets by classification and grading in accordance with the Data Security

efficiency reduce management costs and advance the Company's digital transformation and upgrade. To strengthen Law of the People's Republic of China and implement different security protection strategies and 01

digital management and reduce data security-related risks the Company has formulated the Digital Management technical measures for different levels of data.Measures in accordance with the Network Security Law of the People's Republic of China the Data Security Law of

the People's Republic of China the Measures of Security Assessment for Data Export and other laws and regulations. Each unit shall clearly define the purpose and use of data collection to ensure the legality necessity and

This further standardizes the Company's data security protection efforts safeguarding the interests of both the business relevance of data collection. 02

Company and its customers.Each unit shall meet confidentiality and data de-identification requirements when providing data to

Digital Management Principles external units for business purposes and sign confidentiality agreements if necessary. 03

Those in charge are accountable Those who build are accountable Each unit shall establish a data backup and disaster recovery mechanism perform local backups and

remote disaster recovery for important data and application systems and regularly conduct backup

Digital 04

Management restoration drills to ensure backup effectiveness.Principles

Those who operate are accountable Those who use are accountable Each unit shall implement comprehensive data security control measures and strictly approve operations

related to important data such as access modification deletion transmission import and export. 05

Organizational Structure and Responsibilities for Digital Management

Each unit shall apply technical measures such as data transmission encryption data storage encryption

data leak prevention and business confidentiality protection to ensure the security of important data. 06

The Company has established a Cybersecurity The main responsibilities of the Cybersecurity

When computer terminals and peripherals need to be sent for external repair data backup and clearing

a n d I n fo r m at i zat i o n Lea d i n g G ro u p ( t h e Leading Group include: implementing the

measures shall be taken and security checks shall be conducted before reconnecting to the office

"Cybersecurity Leading Group"). The Company's national guidelines policies laws regulations

network. During software maintenance on-site operations personnel from the unit shall be present. 07

Secretar y of the Party Committee and the and the work requirements of the holding

Equipment disconnection from the network shall be handled securely.Chairman of the Board of Directors serve as c o m p a n y r e g a r d i n g c y b e r s e c u r i t y a n d

the Leader of the Cybersecurity Leading Group. informatization development; making decisions

The Company's Deputy Secretary of the Party and coordinating discussions on the Company's Computer terminals and devices with storage media that are to be discarded shall be disposed of in

Committee and Deputy General Manager (in cybersecurity and informatization development a unified manner. Before disposal proper data backup and clearing measures shall be taken and if

charge of informatization) serve as the Vice work; researching formulating and guiding the 08necessary hard drives storage cards and other devices shall be dismantled.Leader of the Cybersecurity Leading Group. The implementation of the Company's cybersecurity

members of the Cybersecurity Leading Group and informatization development strategic

include the heads of departments (centers) at the plan; coordinating and managing significant The important data of each unit is in principle stored within the territory of China and if provided abroad

headquarters of the Company. matters and key tasks regarding the Company's as required such data shall be approved by the competent authority in accordance with the relevant 09

cybersecurity and informatization development; requirements of national departments.establishing a coordination mechanism for the

Company's cybersecurity and informatization

work; and approving the Company's software Systems that store employee personal information shall comply with national laws and regulations

legalization plan. related to personal information protection. It is strictly prohibited to illegally sell or provide employee 10

personal information to others.

107 108Yunnan Tin Company Limited 2024 Sustainability Report

Measures to Ensure Information and Data Security Case

The Company Participated in a Knowledge Lecture on Data Security to Enhance Internal Data Security

Management.In April 2024 an online knowledge lecture on the standardization of network data security in cybersecurity

was launched by Honghe Autonomous Prefecture. The Company organized relevant personnel to actively

participate in the lecture. The lecture mainly interpreted the standards such as the Data Security Technology

Next-Generation Situation Awareness Zero-Trust

Endpoint

Firewall Gateway Log Audit Detection and - Rules for Data Classification and Grading the Data Security Technology Data Security - Risk Assessment System Response (EDR) Methods the Information Security Technology - Personal Information Security Specification and the

Through a series of cybersecurity technologies the Company collects network traffic in real-time analyzes and Information Security Technology - Security Impact Assessment of Personal Information as well as the

predicts network threats and risks in real-time reduces network threats and risks improves the efficiency and "Zhu Wang 2023" Industrial Network Security Drill Report and organized relevant technical personnel to

defense capability of the Company's network security management and ensures the safe and stable operation analyze the process of attack-defense drills. This lecture enhanced the professional knowledge and skills of

of the Company's business systems. internal personnel ensuring stricter adherence to applicable laws and regulations in digital operations while

mitigating data security risks to protect organizational and client interests.Key Performance

In 2024 no data security incidents or customer privacy leakage incidents occurred in the Company.In 2024 the Company offered 4 training sessions on data security and customer privacy protection and carried

out 1 related emergency drill.Case

The Company Participated in the National Cybersecurity Awareness Week Event to Jointly Create a

Line of Defense for Cybersecurity

In September 2024 the National Cybersecurity

A wa re n e s s W e e k k i c ke d o f f i n H o n g h e

Autonomous Prefecture. The Company was

invited to attend the opening ceremony of the The Company Organized Relevant Personnel to Attend an Online Knowledge Lecture on Network Data

event and actively participated in subsequent Security Standardization

cybersecurity activities. The event themed

"Cybersecurity Serves the People Cybersecurity

Relies on the People" extensively promoted

cybersecurity knowledge and awareness

improved the public's cybersecurity awareness

and skills and created a strong atmosphere

encouraging the whole society to jointly build a The Company Participated in the Opening Ceremony

line of defense for cybersecurity. of the Cybersecurity Awareness Week Event

109 110Yunnan Tin Company Limited 2024 Sustainability Report

Supply Chain Due Dilligence Supplier Performance Evaluation Dimensions「"a Topic of Double Materiality"」

Governance Product Delivery Delivery Emergency After-sales Safety Issue Quality Timeliness Accuracy Guarantee Support Production Handling

The Company understands that supply chain management and risk control are key elements of corporate core

competitiveness. To ensure the stability and timeliness of raw material supply while controlling costs the Company

has established regulations such as the Measures for the Administration of Procurement Activities the Measures for Strategy

the Administration of Suppliers the Measures for the Administration of Electronic Procurement Platform and the

Measures for the Administration of Procurement Review Expert. In supplier management the Company implements The Company has developed systems such as the Supply Chain Due Dilligence Manual - Tin and the Supplier Code

a supplier grading system and evaluates suppliers' performance and capabilities in all aspects. In addition the of Conduct to conduct comprehensive systematic and dynamic management and supervision of suppliers. This

Company continuously optimizes the supply chain due diligence system and strictly controls supply chain risks. ensures that suppliers remain in a controllable compliant and high-quality state throughout the cooperation

Through a systematic management strategy the Company has enhanced its ability to withstand risks and provides a process establishing a solid foundation for the supply chain security of the Company.solid guarantee for the Company's sustainable development.Supplier Development Direction

"Six-Step" Supply Chain Due Diligence System Process

Develop supply chain due diligence policies establish an internal management Active Measures Preventive MeasuresDue Diligence

Management System structure build a supply chain control and transparency system strengthen cooperation with suppliers and establish an appeal mechanism. Increase the proportion of supply to end Prevent insufficient competition

customers

Risk Identification Continuously collect information fully utilize identification tools conduct

and Assessment compliance reviews of information update supplier records and accept Enhance the scale benefits of centralized appeals from stakeholders Prevent supply monopoliesprocurement

Expand the supplier base for key and special Prevent imbalance in the number of

Risk Prevention and Insist on risk prevention as the main focus formulate risk mitigation

materials suppliers and supply structure

Mitigation measures track and monitor risks and consult stakeholders' opinions.Transparent Procurement Mechanism

Internal and External Implement internal evaluation - due diligence performance management;

Evaluations external evaluation - third-party evaluation

The Company has established "One Platform" and

The Company establ ishes a procurement "One Mall" unified supplier management adhered

Communication and Report management system of "headquarter decision- to the underlying logic of the separation of powers

About Risk Management Release the annual report of supply chain due diligence making unified management and graded implemented a procurement risk control system

Processes and Results responsibility" and implements procurement increased procurement sourcing efforts and

management according to the principle of continuously optimized the business environment.separating decision-making management Additionally we require our registered suppliers to

implementation and supervision. sign the Commitment to Compliance and Integrity

Remediation Provide conditions or cooperate to carry out remedies in a timely manner continuously promoting transparent procurement.

111112

Supplier Development DirectionYunnan Tin Company Limited 2024 Sustainability Report

Case Requirements for Supply Chain Due Dilligence

The Company Offered Training on Supply Chain Due Diligence and Compliance Construction to

Enhance Management Capabilities.Requirements Regarding Serious Infringements Requirements Regarding Direct

To meet the demands of globalization Related to Mineral Extraction Transportation or Indirect Support to Non-State

and understand the global mineral supply or Trade Armed Groups

chain due diligence requirements as well

as the market and customers' expectations When conducting procurement or business We will not tolerate providing direct or

for compliance construction in upstream activities in "conflict-affected and high-risk areas" indirect support to non-state armed

smelting plants the Company offered we neither tolerate nor profit from assist support groups through mineral extraction

training on supply chain due diligence and or facilitate any party in implementing: any form of transportation trade processing or

compliance construction in August 2024. This torture cruel inhuman or degrading treatment; export. The act of "providing direct or

training covered topics such as international any form of forced or compulsory labor. Forced indirect support to non-state armed

laws and regulat ions g lobal mineral or compulsory labor refers to any work or service groups through mineral extraction

competition and supply chain governance extracted from any individual under the threat of transportation trade processing or

helping the Company learn and master punishment which the person does not voluntarily export" includes but is not limited to

ways to address supply chain compliance provide; the worst forms of child labor; other severe purchasing minerals from non-state

challenges and improve its capabilities in The Company Offered Training on Supply Chain Due

Diligence and Compliance Construction human rights violations such as widespread sexual armed groups or their affiliates making mineral supply chain due diligence. violence; war crimes or other serious violations payments to them or providing

of international humanitarian law crimes against logistical support equipment or other

humanity or genocide. assistance.Impact Risk and Opportunity Management

Requirements Regarding Public or Private Requirements Regarding Bribery

Security Forces Corruption and Fraudulent Misrepresentation of Mineral Origin

With increasing external environmental uncertainties supply chain risk management has become an indispensable part

of corporate strategic planning. The Company consistently upholds a rigorous business philosophy incorporating supply

chain risk management into its comprehensive risk management system. Through scientific process design and efficient We prohibit providing direct or indirect support We will not offer promise engage in

management mechanisms it ensures the efficient operation of the supply chain and manageable risks. We are committed to public or private security forces that illegally or demand any bribes and we resist

to establishing long-term stable and mutually trusted relationships with suppliers. Through collaborative management control mining sites transportation routes temptation. We will not bribe to conceal

and innovative practices we jointly address various potential risks ensuring the resilience and competitiveness of the and upstream entities in the supply chain or falsify the origin of minerals or to

supply chain and laying a solid foundation for the sustainable development of the Company. such as illegally imposing taxes or demanding falsely report taxes fees and royalties

money or minerals at mining site entrances that shall be paid to the government for

Management Measures for Supply Chain Risks along transportation routes or at mineral mineral extraction trade processing

trading points or imposing illegal taxes or transportation export etc.Strengthening Risk Management in the Procurement Review for Tin-Containing extorting intermediaries export companies or

Materials to Ensure the Safety and Compliance of Procurement Activities international traders.The Company systematically collects and organizes information

and reports from UN agencies government departments industry Metrics and Targets

organizations and non-governmental organizations analyzing risk

public opinion related to the Company. Providing key support for

the compliance review of the Company's tin-containing material The Company continuously promotes the healthy development of the supply chain from bottom to top maintaining

procurement business further ensuring the stability and continuity a good industry chain ecosystem.of the supply chain.In 2024 the Company achieved a 100% signing rate for the Supplier Compliance and Integrity Commitment Letter.

113 114Yunnan Tin Company Limited 2024 Sustainability Report

Employees Fair and Just Recruitment

· T he Company shall:

A high-quality and diverse workforce is not only the key to achieving the Company's strategic goals but also an

important manifestation of the Company's social responsibility. The Company regards talent management as a key · Never set any discriminatory conditions based on ethnicity race gender religious beliefs etc;

part of its operations and is committed to establishing a complete and efficient management system in employee · Never set any conditions unrelated to recruitment positions;

recruitment rights protection development and training as well as occupational health and safety. This ensures that · Never set limits such as graduation schools household registration marital status etc.;

the legal rights and interests of every employee are fully respected and protected and that employees are offered · Never lower or raise any recruitment conditions in the same recruitment batch;

opportunities to realize their personal value and career growth.· Post the recruitment results on the Company's official website bulletin board or other public media disclose

the contact phone number and address of the disciplinary department for reporting and supervision and

ensure the announcement period is no less than 7 days.Employment

The Company firmly implements the "talent-driven development" strategy and adheres to the principles of

openness fairness justice and merit-based selection in talent recruitment. we strictly prohibit the employment Efficient Utilization of Internal Human Resources

of child labor and forced labor oppose all forms of discrimination and insist on building a diverse talent system.Moreover we value internal human resources regularly analyze internal human resource needs and actively

promote talent mobility to ensure the efficient utilization of talent within the Company.The Company implements periodic human resource

Af te r a n a l y s i s a n d a s s e s s m e n t i f

inventories regularly conducts surveys of human resource

Recruitment Principles of HR Department the Company determines that some conditions in each department and subsidiary collects

positions can be prioritized by internal

and grasps human resource demand information in a

staff transfer or competit ive open

Inroducing timely manner analyzes the objectivity and necessity Seeking selection to meet the demand it will both Talent and of the demands and provides internal human resource proactively communicate and coordinate

Ensuring Open Adopting Intelligence Talent with supply and demand information to each department and

Fair Just and Multi-Faceted and Prioritizing Morality and to efficiently utilize existing human Approaches Competence subsidiary. The Company also supports and services the Merit-Based and Multiple Equally both

resources.movement of internal human resources.Recruitment Measures Human and

While Giving

Intellectual Priority to

Resources Morality

Key Performance

Open Fair and Just Recruitment Process

In 2024

Open Recruitment The total number of employees in the Company was 13247 of which 11516 were local employees accounting

· T he Company shall clearly define recruitment plan procedures information release recruitment discipline for 86.93%;

supervision channels and other recruitment requirements.The proportion of full-time employees was 100%;

· The recruitment plan shall not lack details such as the recruitment positions and conditions number of

recruits recruitment schedule and recruitment methods. The number of newly hired employees was 163;

· Recruitment information shall be publicly released through channels such as government websites The turnover rate of employees (including retired employees) was 5.16%.company websites employer websites third-party service agency websites broadcast TV newspapers

magazines new media etc.

115 116Yunnan Tin Company Limited 2024 Sustainability Report

93 1373 Employee Welfare

28250.70%252510.36%2331

21.33% 19.06% 17.60% Insurances Benefits

Gender Educational Age Pension insurance work injury insurance Paid annual leave sick leave marriage leave

Composition Background Composition medical insurance maternity insurance bereavement leave maternity leave maternity

of Employees of Employees of Employees unemployment insurance housing provident care leave family planning surgery leave

10422 10629 9543 f u n d e n t e r p r i s e a n n u i t y e m p l o y e e breastfeeding leave family visit leave work

78.67% 80.24% 72.04% supplementary medical insurance regular health injury leave etc.

checks for employees employee medical mutual

Male Female Master's degree or Above Above 50 years old assistance accident insurance etc.Bachelor 30-50 years old

College degree or below Under 30 years old

Performance Appeal Mechanism

Number Proportion

Number of Employees of Minority Nationalities 4771 36.02% After the performance evaluation If an employee disagrees with the The Human Resources

results are determined the annual performance evaluation Department together with the

Number of Employees with Disabilities 115 0.87%

department (center) head will results they may communicate heads of relevant departments

Number of Veteran Employees 622 4.70% provide feedback to employees with the heads of the relevant (centers) (and if necessary

and offer suggestions for departments (centers). If the the leaders in charge of the

Employment of Relevant Employees in 2024 improvement. issue cannot be resolved the departments or centers) will

employee can submit an appeal review the reasonableness of the

in writing or through face-to-face appeal and respond accordingly.Protection of Rights and Interests communication to the Human

Resources Department.The Company always adheres to the "people-oriented" philosophy. We are committed to building a fair transparent

and competitive compensation system. Through a diversified salary structure we ensure that employees' hard work is Employee Congress System

reasonably rewarded and provide employees with smooth performance appeal channels. The Company places great

importance on employees' welfare protection constantly improving welfare policies and providing comprehensive care The Employee Congress is the basic form of democratic management in the Company and

and support to help employees achieve a balance between work and life. We strictly abide by and implement the policies serves as the institution through which employees exercise their democratic management

and regulations set by the higher authorities such as the Measures for Pairing Assistance of Employees in Difficulty and the rights. While establishing the corporate leadership structure and organizational

Measures for the Administration of Archives of Employees in Difficulty among other 9 policies aimed at helping employees management systems in accordance with applicable laws the Company also establishes

in need providing comprehensive guarantee for the Company's employees facing difficulties. and implements a democratic management system based on the Employee Congress

adapting to the new changes brought by the corporate system and actively exploring and

Remuneration Structure and Influencing Factors practicing new ways of democratic management.Key Performance

Position Value Company Performance

Work Performance Department Performance

Position Performance-

Working Competency Individual Performance In 2024 the Company assisted 503 employees in difficulty with the fund for assistance amounting to RMB Salary related Pay

1.8346 million. The employee social security coverage rate is 100%.

117 118Yunnan Tin Company Limited 2024 Sustainability Report

Case Case

The Company Convened the Employee Congress to Encourage Employees to Participate in the The Company Launched the Golden Autumn Education Assistance Event to Reduce the Financial

Decision-Making for Internal Affairs Burden on Families of Employees in Difficulty

In February 2024 the Company held the third meeting of the second Employee Congress with 206 In 2024 to continue implementing the "1+10" assistance service system for employees in difficulty

participants. At the congress the Company listened to and reviewed documents such as the Measures the Company launched the Golden Autumn Education Assistance Activity to actively help families of

for the Administration of Total Wages of Yunnan Tin Co. Ltd. and the Measures for the Administration employees in difficulty alleviate the financial strain of their children's education. The event provided

of Performance Evaluation and Compensation of Middle Management of Yunnan Tin Co. Ltd. The financial subsidies to 47 children of employees in difficulty who participated in the high school or college

Company received 9 proposals. During the proposal handling process several issues concerning entrance examinations and were admitted with a total subsidy of RMB 267.5 thousand including RMB

employee protection were resolved such as reducing manual labor intensity and opening channels 80.3 thousand from the Company It also effectively reduced the financial burden on families of employees

for querying individual accounts of the Company annuity. The congress reflected the democratic in difficulty reflecting the Company's care for its employees and allowing them to focus more on their

nature of the Company's management encouraged employees to actively participate in the work with peace of mind.discussion and decision-making of company affairs and enhanced employees' sense of belonging

and responsibility.Case

The Company conducted the "Sending Coolness" Event to Enhance Employees' Sense of Belonging

Case

The Company Addressed Wage Arrears to Protect the Rights and Interests of Migrant Workers

In July 2024 the Company organized the "Union Warmth Reaches Thousands of Families" sending

In November 2024 the Company launched the winter action to address wage arrears. This action based coolness activity. This activity provided cooling and heat-relieving "coolness packages" to 10821 frontline

on the general requirements of treating the source preventing risks strengthening supervision severe employees who work in high (low) temperature environments high-altitude environments or harsh dirty

punishment and ensuring a bottom line focused on the construction project field ensuring that migrant tiring and dangerous job positions. The packages contained cooling devices cooling products summer

workers participating in the projects receive their due compensation in a timely manner. At the same beverages and other materials. The total expenditure for the activity was RMB 1.069 million. This activity

time it ensures that cooperative units do not face wage arrears or major mass incidents extreme events reflected the Company's concern and respect for its frontline employees and enhanced employees' sense

or negative online public opinion caused by wage arrears. After the Company's inspection Yunnan Tin of belonging and recognition.and its affiliated units have paid migrant workers in accordance with the contractual agreements and

project settlement conditions with no wage arrears. The action effectively protected the rights of migrant

workers and maintained and enhanced the Company's brand image.Case

The Company Provided Work-Study Positions to establish a "Self-Sustaining" Assistance Mode

In 2024 the Laochang Branch provided work-study positions for the children of employees in difficulty

aiming to allow the children of these employees to receive living allowances while gaining work

experience. The act mainly arranged for the children of employees in difficulty to participate in tasks

such as organizing employee files and assisting with various aid projects. It also enabled the children of

employees in difficulty to earn labor compensation and gain social practice experience promoting the

transformation of the aid model from "blood transfusion-type" to "self-sustaining-type" demonstrating

the Company's original mission and commitment to serving and uniting employees through practical

actions. The Company Organized the "Sending Coolness" Event

119 120Yunnan Tin Company Limited 2024 Sustainability Report

Case

The Company Carried Out Warmth-Giving Activities on Holidays to Further Enhance Employee Development and Training

Happiness

In 2024 the Company continued to optimize the talent development environment create a talent development

In 2024 the Company carried out warmth-giving activities for employees in difficulty retired personnel and atmosphere of "respecting labor respecting knowledge respecting talent and respecting creativity" fully leverage

frontline employees on the New Year's Day the Spring Festival the Mid-Autumn Festival and the National Day. the role of outstanding talents as models and leaders and strengthen the construction of the cadre talent team. We

During the activities the Company's representatives engaged in an in-depth communication with the recipients also promoted the integrated development of talent "attraction training and utilization" with the goal of learning

acknowledged the contributions made by employees to the Company's development distributed consolation what is lacking and being practical and effective. The Company adheres to the principle of "Focusing on Internal

funds and gifts and extended holiday greetings and blessings. A total of 327 people were comforted further Training Supplementing with External Training" increasing the intensity of categorized layered and graded training

enhancing employee happiness and increasing the Company's cohesion and centripetal force. for employees continuously improving the comprehensive quality and business skills of the workforce.Career Development System

The Company and its affiliated units have Employees in the professional sequence

establ ished a "mult i -channel" career can qualify for salary adjustments and

development system for employees. The career development points through annual

headquarters has divided all positions into p e r fo r m a n ce e va l u at i o n s o bta i n i n g

The Company Carried Out Warmth-Giving Activities on Mid-Autumn Festival and National Day management and professional sequences. professional titles/professional (vocational)

The management sequence consists of 5 q u a l i f i c a t i o n s f u r t h e r e d u c a t i o n

levels while the professional sequence receiving competition awards and being

consists of 8 levels. Employees in the recognized with honors. When their career

Case management and professional sequences development points reach a certain score

The Company Held a Female Health Knowledge Lecture to Raise Female Employees' Self-Protection may switch development sequences upon they can trigger a salary increase.Awareness meeting the corresponding conditions.In March 2024 the Laochang Branch invited a professional doctor to hold a female health knowledge lecture

titled "Caring for Women's Health Sharing the Sunshine of Life". More than 70 female employees participated

in the lecture. The lecturer using a combination of images and text combined clinical experience and real-life Talent Development Reward Scheme

cases to provide a detailed introduction to the symptoms and dangers of breast cancer. After the lecture breast

cancer early screening was conducted for the female employees present. The lecture promoted healthy living

for women raised the self-protection awareness of female employees and enhanced their ability to prevent The Company's talent External talent recruited Internal talent trained

diseases reflecting the Company's deep care for female employees. development rewards are includes three categories: includes four categories:

available for external talent national talent national talent provincial

recruited and internal provincial talent and talent technical talent and

talent trained in house. high-educated talent. high-qualification talent.Talent Pool Mechanism

The Laochang Branch Organized a Female Health Knowledge Lecture and Breast Cancer Screening To strengthen optimize and support the cadre talent team for the high-quality development the Company has

conducted a special talent team survey within its affiliated units. Through interviews surveys and talent inventory

models the Company guides its affiliated units to establish improve and dynamically manage talent pools.

121 122Yunnan Tin Company Limited 2024 Sustainability Report

Key Performance Case

The Company Organized Training on System Certification Standard Requirements to Enhance

Employees' Management Ability

In 2024 the Company spent RMB 13.6857 million on employee training and offered 9251 training sessions

In July 2024 the Company invited experts in system certification to conduct training on system

with a 100% employee training coverage rate. certification standard requirements with 279 employees participating. Through key point

sorting case interpretation discussions and exchanges the Company employees systematically

The total training duration for employees amounted to 599281 hours namely 129515 hours for female understood the core content of system management strengthened their understanding of the

employees and 469766 hours for male employees. necessity and importance of establishing and implementing the "Four Systems" enhanced the

Company's personnel awareness of quality environment occupational health and safety and

The average training duration per employee was 45.24 hours namely 45.85 hours for female employees and energy management and helped employees improve their management abilities.

45.07 hours for male employees.

In 2024 a total of 93 applications for talent development rewards were

submitted with the amount of reward totaling RMB 1.496 million.By the end of 2024 there were 834 talents in talent pools. The

Company carried out dynamic management of its talent pools in 2024.Training Programs Types of Training Targeted trainee

Tin Talent Plan Ability Improvement Training for Professional Technical Backbones Professional technical backbone

Leap Plan 2024 Newcomer Training Camp Newly hired college graduates

The Company Organized Training on System Certification Standard Requirements

Elite Plan Business Knowledge Training in Business backbones in professional management Professional Management Fields fields

Skill Improvement Training for High-

Skill Talent Senior workers and skilled operators Case

The Company Offered Training on Customs Affairs and Advanced Enterprise Certification to

Strengthen Employees' Abilities to Analyze and Solve Problems

Craftsman Plan Training on Three Positions Safety Unit heads safety management personnel

Technologies special operations personnel

In June 2024 the Company organized training on customs affairs and advanced enterprise

certification with 47 employees participating. This training invited experts in the field to explain

Professional Skills Training Skilled operators the origin and trade agreements origin certificate visa practices origin certification and AEO

certification enterprise supply chain security to employees strengthening their ability to analyze

and solve problems in this area further developing employees' thinking and knowledge systems.Employee Training Plan i 2024

123 124Yunnan Tin Company Limited 2024 Sustainability Report

Occupational Health and Safety

In accordance with the Law of the People's Republic of China on Prevention and Control of Occupational Diseases the

Law of the People's Republic of China on Work Safety and the Measures for the Administration of Emergency Response

Plans for Production Safety Accidents the Company has developed systems such as the Measures for the Administration

of Occupational Health the Safety Production Responsibility Regime and the Comprehensive Emergency Plan for

Production Safety Accidents establishing a sound occupational health management and safety production management

system. The Company's Secretary of the Party Committee Chairman and General Manager jointly serve as the main

responsible persons for safety production to strengthen the operation control of the safety production management

system continually eliminating or reducing employees' occupational health and safety risks.Eliminating Fatal Accidents Major Traffic Preventing and Reducing Injury Occupational Health and Safety Management System Certification

Accidents and Major Fire Accidents Occupational Accidents

Health and Key Performance

Keeping Injury Rate per Thousand People Safety Goals Maintaining Injury Rate per Thousand

in Aboveground Mining Units < 2% People in Underground Mining Units < 5%

In 2024

Health and Safety Dual Prevention Mechanism The work-related injury rate was 0.13%;

The injury rate per million working hours was 0.67 person-times/million working hours;

In terms of the occupational health and safety In terms of safety standardization all company units The workdays lost due to occupational injury were 7156 days;

m a n a g e m e n t s y s t e m t h e C o m p a n y h a s have completed safety production standardization

established a unified set of 17 basic management construction according to the 8 standard modules The participants in safety training sessions were 242352 person-times;

processes and 9 occupational health and safety and are operating regularly. The Company has

management processes. Related management and basically achieved systematic occupational health Invested RMB 266.7975 million in safety production;

operations are carried out according to the work and safety management standardized job operation The investment in occupational injury insurance investment was RMB 25.1461 million with a coverage rate of 100% for all

methods content and requirements of process behaviors intrinsic safety of equipment and facilities

management. Through systematic and structured and designated placement of work environment employees;

management control various risks are effectively tools forming a self-management and self- The investment in safety production liability insurance was RMB 1.6924 million with a coverage rate of 100% for all

managed and controlled. improvement mechanism.employees;

In 2024 the Company did not have any major or above production safety accidents.In 2024 the Company organized 9013 employees exposed to dust and toxins to participate in occupational health check-ups.Each subsidiary unit completed the detection public disclosure and reporting of occupational hazard factors for each position.In 2024 the Company organized 181 practical emergency drills with 3890 participants and observers. The Company also

organized 128 emergency training sessions for production safety accidents with 4891 participants.By the end of 2024 the Company had identified a total of 10098 safety risks with 554 new risks added in 2024 all of which

were evaluated and classified.Four-color map of Tin Branch security risks In 2024 the Company updated 42 safety risk four-color distribution maps based on changes in risk distribution.

125 126Yunnan Tin Company Limited 2024 Sustainability Report

Safety Production Policy Case

The Company Organized Safety Production Month Event to Enhance Employees' Safety Awareness

and Emergency Response Capabilities.In June 2024 the Company held Safety Production Month activities. The event themed "Everyone

Talks Safety Everyone Can Handle Emergencies—Smoothing Life Channels" was carried out through

various forms such as "walking classrooms" setting up consultation desks distributing safety

production knowledge handbooks displaying popular science exhibition boards interactive Q&A

Safety First Prevention Foremost Comprehensive Governance and experience activities to carry out safety production theme publicity and education. A total

of about 900 promotional materials were distributed and 64 promotional exhibition boards were

displayed effectively raising employees' safety awareness and emergency response capabilities and

laying a solid foundation for strengthening the Company's safety defense line.Management Measures for Safety Production in 2024

Potential Hazard Identification and Rectification as well as Process System Safety Improvements

· D atun Tin Mine Laofactory Branch and Kafang Branch optimized the underground ventilation system

· Datun Tin Mine promoted the application of lightweight mobile temporary support devices for Safety Production Month Event

underground mining surfaces

· H ualian Zinc Indium completed the construction of the monitoring system for mine slopes and waste

dumps and connected it to the provincial monitoring platform

· K afang Branch carried out special rectification for ramp safety and built flood interception ditches Case

The Company Organized Publicity for the Law of the People's Republic of China on Prevention and

Control of Occupational Diseases to Create an Environment Where All People Value Occupational Health

Exploration of Safety Management Models In April 2024 the Company organized an event themed "Prioritizing Prevention Guarding

Occupational Health" to promote the Law of the People's Republic of China on Prevention

and Control of Occupational Diseases. The event invited professionals to deliver lectures on

· Copper Branch explored and promoted the "safety lock" control method for high-risk operations occupational health monitoring knowledge and occupational disease prevention and control

further improving the risk control level for high-risk operations knowledge along with practical demonstrations of emergency self-rescue and mutual rescue

· W enshan Zinc Indium relied on the safety and environmental control platform to establish an online skills. At the same time the event used banners

exam module for employee safety education and training and promotes its application screens windows and other promotional media

to publish occupational disease prevention

a n d co n t r o l k n o w l e d ge d i st r i b u t i n g 3 4 3 3

related promotional materials reaching an

Increase of Investment in Emergency Equipment audience of 10247 people. This event not only

i m p r o v e d e m p l o y e e s ' o cc u pat i o n a l h ea l t h

literacy and emergency response abilities but

· W enshan Zinc Indium newly configured 6 sets of defibrillators and conducts operational skills training also created an atmosphere in which all parties

· E ach unit is equipped portable leak detectors emergency shower devices air respirators emergency value occupational health which is of great Publicity for the Law of the People's Republic

medications and other types of emergency equipment and supplies based on the risk characteristics significance for safeguarding employee health of China on Prevention and Control of

of different positions and maintains daily maintenance and promoting enterprise development. Occupational Diseases

127 128Yunnan Tin Company Limited 2024 Sustainability Report

Measures for the Administration of Training on Safety Production Medical Treatment

Prepare relevant rescue equipment and medicines according to the information provided by the alarm and

Employees involved in safety Employees shall receive safety training be familiar Employees who the nature of the accident quickly arrive at the designated site provide immediate first aid and bandaging

training include primary with relevant safety production regulations and safety have not passed based on the injured personnel's condition ensure proper arrangements for their transfer to medical facilities

responsible persons safety operating procedures possess necessary safety safety training and avoid causing secondary injuries to the injured personnel when providing first aid and bandaging.production management production knowledge master safety operating skills are not allowed

personnel special for their positions understand emergency handling to work. On-site Monitoring and Environmental Protection

operations personnel and measures for accidents and get aware of their rights and Strengthen emergency monitoring of air water soil etc. Based on the types properties of pollutants and the local

other workers. obligations in safety production. natural and social environmental conditions define the corresponding emergency monitoring plans and methods

determine the monitoring locations and frequency allocate emergency monitoring equipment and vehicles and

monitor in a timely and accurate manner to provide a basis for emergency decision-making. Properly collect clean

Case and safely dispose of toxic and hazardous substances as well as fire-fighting wastewater waste liquids etc.The Company Conducted Specialized Safety Training to Enhance Hazard Prevention Awareness

Technical Support

In December 2024 the Company organized a The expert technical team analyzes the hazardous factors and risks within the impact range of the accident and

safety-focused training session for the mining and proposes control measures; analyzes the development trend of the accident and proposes preventive measures

industrial sectors with more than 150 participants. to prevent the accident from spreading; provides timely technical consultation for the rescue site; researches and

This training covered topics such as safety proposes solutions for technical difficulties encountered during the on-site emergency rescue operation.production-related laws and regulations risk

identification and hazard investigation emergency

p l a n s e tc . h e l p i n g va r i o u s s a f e t y - r e l ate d

personnel further strengthen their awareness Case

of hazard prevention improve the Company's The Company Conducted Emergency Drills for Production Safety Accidents to Improve Emergency

response ability when handling safety incidents The Company Conducted Specialized Safety Rescue Capabilities

and ensure the Company's safe production. Training for the Industrial and Trade Sector

In June 2024 the Company conducted a joint emergency drill for a slope collapse accident at an open-

pit mine. The drill simulated a slope collapse accident in an open-pit mine after continuous rainfall

resulting in the burial of some equipment and personnel being trapped in an emergency situation.Emergency Response Plan for Production Safety Accident Emergency personnel immediately took the corresponding actions according to the emergency plan

requirements and successfully completed the drill. The drill further promoted the implementation

Alert Evacuation of emergency management responsibilities strengthened safety production responsibilities and

Quickly delineate the alert area set up obvious markers such as warning zones fences etc.; evacuate effectively improved the emergency rescue capabilities for non-coal mining accidents.personnel unrelated to emergency handling from the alert area promptly notify units and personnel who

might be affected by the incident to reduce unnecessary casualties; deploy alert personnel prohibit unrelated

personnel from entering the alert area; record and mark the original state of the accident site protect the

accident scene and related evidence and cooperate with the rescue team to organize rescue operations.Personnel Search and Rescue and Engineering Emergency Rescue

At the first moment of an accident carry out personnel search and rescue and engineering emergency rescue.Depending on the nature of the accident bring special protective equipment specialized tools and safety

protective clothing and quickly reach the designated site. After the accident occurs quickly control clear

or isolate hazardous sources to prevent secondary accidents while organizing the search and rescue of

endangered personnel. The initial response personnel at the scene cooperate with the rescue team to rescue The Company Conducted Emergency Drills for Production Safety Accidents

the injured in a timely manner take necessary measures to prevent the accident's impact from expanding

and prevent secondary and derivative disasters from occurring.

129 130Yunnan Tin Company Limited 2024 Sustainability Report

Social Contribution Case Laochang Branch Organized Blood Donation to Demonstrate Responsibility and Commitment

through Practical Actions

Conducting public welfare activities is an important manifestation of the Company's commitment to social

responsibility. The Company continuously gives back to society in various ways focusing on areas such as education In September 2024 the Laochang Branch organized a voluntary blood donation activity with 47

health and elder care. In the education field the Company cares about students' academic and living conditions; employees participating. During the activity employees followed the guidance of staff to complete

in health the Company focuses on various groups in need of medical assistance; and in elder care the Company processes such as form registration physical examination inquiries initial screening tests and listened

emphasizes both spiritual and practical support for the elderly. Through social welfare activities the Company not attentively to the medical staff's explanations of blood donation knowledge and precautions before

only contributes to society but also enhances employees' sense of social responsibility and team cohesion. The successfully completing the blood collection. This voluntary blood donation fully demonstrated the

Company will continue to work hard spreading love and warmth through practical actions allowing the flower of employees' high social responsibility enthusiasm for public welfare and willingness to contribute. The

public welfare to bloom in more places. Company will continue to strengthen publicity efforts encouraging more employees to actively participate

in public welfare activities and demonstrate responsibility and commitment through action.Key Performance

In 2024

1059 person-times of employees participated in the volunteer activities;

The average volunteer service time was 216.8 hours per person.Laochang Branch Organized Voluntary Blood Donation

Case

Laochang Branch Conducted Volunteer Activities to Care for Students' Learning and Life

Case

Tin Branch Organized the Elderly Care Event on the Double Ninth Festival

In April 2024 the Laochang Branch conducted a volunteer service activity themed "True Love

Warms Children's Hearts and Devoted Companionship Ensures Their Healthy Growth" at an

elementary school campus. During the activity volunteers learned about the students' academic In October 2024 with the arrival of the Double Ninth Festival Tin Branch organized an event themed

and living conditions offered encouragement in their studies and daily lives and provided them "Filial Piety Comes First". The event provided the elderly with living supplies and holiday blessings

with stationery basketballs and other items. The volunteer service activity aimed to care for the and invited an art troupe to perform a dance for the elderly. In addition the event included a fun

growth of students help them establish a correct view of life cultivate a positive and uplifting quiz to educate the elderly on health and anti-fraud knowledge as well as offering free medical

spirit and demonstrate the Company's sense of social responsibility. services such as blood pressure measurements supporting the elderly in maintaining a healthy life.The event reflected the Company's care for the elderly showcased the Company's responsibility and

commitment and further promoted the social ethos of respecting and caring for the elderly.Laochang Branch Organized Campus Volunteer Service Activities Tin Branch Organized the Elderly Care Event on the Double Ninth Festival

131 132Yunnan Tin Company Limited 2024 Sustainability Report

Rural Revitalization Case The Company Supported the Construction of Rural Infrastructures to Improve Local Living

Environment

The Company always considers consolidating and expanding the achievements of poverty alleviation and effectively To achieve the goal of "building beautiful ecology and livable environment helping people

connecting them with rural revitalization as a top priority and a social responsibility it shall fulfill firmly safeguarding enjoy peace and prosperity in work and life" the Company invested RMB 552400 to support

against any large-scale return to poverty. The Company focuses on improving the development level of rural infrastructure construction in 2024 which was used for the repair of infrastructure in four

industries enhancing rural construction standards and advancing rural governance levels. We take measures villages: Mazong Village Shierjiao Village Shangchenong Village and Xiaboyi Village including

to promote continuous income growth for people lifted out of poverty help rural areas achieve comprehensive the construction of suspended road sections. The construction of the suspended road section

development in ecological livability thriving industries and effective governance so that the people in rural addressed the practical needs of the villagers helped improve the local living environment

revitalization can have more sense of achievement and happiness. enhanced the quality of life of the people and further promoted rural revitalization.Key Performance

In 2024

The investment in rural revitalization amounted to RMB 1.9804 million;

The number of people assisted reached 5491.Case 悬空路段建设情况

The Company Participated in the "Purchase-for-Assistance" Event to Consolidate Poverty Alleviation

Achievements

In 2024 the Company organized some of its grassroots units to participate in the "Purchase-for-

Assistance" event in Mazong Village. The Company cooperated with the Lvxing Cooperative to Industry Co-construction

purchase 25.24 tons of terraced red soft rice planted by poor households at a total price of RMB

367300. The event effectively promoted the sale of local specialty agricultural products and helped

poor households increase their income through consumption-based assistance. It further deepened The Company understands that the development of the industry relies on collaborative cooperation from all parties.the Company's connection with rural areas and consolidated the results of poverty alleviation. Therefore we treat small and medium-sized enterprises equally and actively collaborate with companies within the

industry and industry associations to jointly build a healthy and sustainable industrial ecosystem. By participating

in the formulation of industry standards resource sharing and technological exchanges the Company helps the

industry break through bottlenecks and promote technological innovation. Moreover we regularly participate in

industry exchange activities build communication bridges and promote the sharing of knowledge and experience.We firmly believe that only in an open and cooperative atmosphere can the industry thrive. In this process we will

realize our own value and growth and make a greater contribution to the long-term development of the industry.Accounts Payable and Overdue Payment

The Company firmly maintains a healthy industry ecosystem and treats small and medium-sized enterprises

The Company Participated in the "Buy Instead of Help" Event at Mazong Village equally. At of the end of 2024 the balance of accounts payable (including accounts payable notes) was RMB

1.4 billion accounting for 3.82% of the total assets.

133 134Yunnan Tin Company Limited 2024 Sustainability Report

Type of Organization Compilation Type of Organization S/N Standard Name/Relevant Content Standard or Unit S/N Standard Name/Relevant Content Standard or

Compilation

Participation Participation Unit

National Methods for Chemical Analysis of Copper 1 Full English Translation of Tin Ingot Standard Organization Yunnan Tin Lead Zinc Original and Tailing Ores - Part 6:

15 Determination of Copper Lead Zinc Nickel Industrial Hualian Zinc

2 Green Factory Evaluation Requirements for Tin Industrial Cobalt Cadmium Magnesium Manganese Standard

Participation Indium

and Tin Alloy Production Standard Organization Yunnan Tin Arsenic and Molybdenum Content - Inductively

Methods for Chemical Analysis of Cast Bearing Coupled Plasma Atomic Emission Spectroscopy

Metals – Part3: Determination of Antimony Industrial Technical Guidelines for the Construction of the 3 Content – Cerium Sulfate Titrimetric Method Standard Participation Yunnan Tin 16 Dual Prevention Mechanism for Environmental Group and Potassium Bromate Potentiometric Risks in Industrial Enterprises - Identification Standard Participation Yunnan Tin

Titration Method and Classification of Pollution Sources

4 Management Rules of Heavy Non-Ferrous Group Metals Enrichment and Metrallurgy Balance Standard Participation Yunnan Tin Participation of the Company and its Subsidiaries in the Formulation and Revision of Standards in 2024

5 Copper Matte Group Standard Participation Yunnan Tin Case

Representatives of the International Tin Association Visited the Company for Exchange and

6 Zinc Stannate Group Participation Yunnan Tin Discussion on Industry DevelopmentStandard

Methods for Chemical Analysis of Zinc Stannate Group Hualian Zinc In November 2024 representatives of the International Tin Association visited the Company for 7 – Part 1: Determination of Zinc Content - Standard Participation Indium a tour and exchange discussing supply chain due diligence. During the visit the guests toured Potassium Iodate Titration the Datun Tin Mine Tin Branch and conducted on-site inspections of the Intelligent Operations

Methods for Chemical Analysis of Zinc Stannate Center the Top-Blown Furnace Main Control Room the Tin Cultural Corridor 5G Intelligent

8 – Part 2: Determination of Zinc Content - Group Standard Participation

Hualian Zinc

Indium Warehousing and the Raw Material Warehouse gaining a deep understanding of the Company's Na2EDTA Titration Method mining beneficiation and smelting production processes. Both parties engaged in in-depth

Methods for Chemical Analysis of Tin – Part 1: discussions on system optimization risk management and mining source conditions and

9 Determination of Copper Lead Zinc Cadmium National

shared insights on how to improve the effectiveness of supply chain due diligence and promote

Silver Nickel and Cobalt Contents – Flame Standard Organization Yunnan Tin cooperation and development among stakeholders. This further deepened mutual cooperation

Atomic Absorption Spectroscopy and consensus in the field of supply chain due diligence.

10 Tin Balls 行业标准 Organization Yunnan Tin

11 Arsenic Trioxide National Standard Participation Yunnan Tin

Specification for Limit on Harmful Element

12 Content of the Heavy Nonferrous Metal National Participation Yunnan Tin

Concentrates Standard

13 Stannous Iso Caprylate Industrial Standard Participation Yunnan Tin

Methods for Chemical Analysis of Copper

14 Lead Zinc Original and Tailing Ores - Part 2: Industrial Hualian Zinc Representatives of the International Tin Association Visited the Company for ExchangeDetermination of Lead and Zinc Content - Standard Participation Indium

Na2EDTA Titration Method

135 136Yunnan Tin Company Limited 2024 Sustainability Report

Case

The Company Attended the OECD Forum on Responsible Mineral Supply Chains to Promote Indexes

Harmonious Industry Development

In May 2024 the 17th OECD Forum on Responsible Mineral Supply Chains was held in Paris GRI Standards Disclosure Relevant Section

France. The forum a major international event in the field of responsible business conduct

gathered international organizations standard-setting bodies auditing organizations government 2-1 Organizational details About This Report

departments and upstream and downstream enterprises from the global mineral supply chain.The Company attended the forum and gave a presentation on the Company's supply chain due 2-2 Entities included in the organization's sustainability reporting About This Report

diligence system and responsible tin supply chain development. The Company advocated for

2-3 Reporting period frequency and contact point About This Report

smelting enterprises to emphasize the

importance of mining resource source 2-5 External assurance Independent Assurance

audits highlighted the feasibility of Statement

standards in dif ferent regions and

2-6 Activities value chain and other business relationships About Us

c a l l e d f o r b e t t e r c o m m u n i c a t i o n

b e t w e e n s t a n d a r d s a n d g r e a t e r 2-7 Employees Employees

r e c o g n i t i o n a c r o s s u p s t r e a m a n d

downstream stakeholders to promote The Company Attended the 17th OECD Forum on 2-9 Governance structure and composition Corporate Governance

harmonious industry development. Responsible Mineral Supply Chains

2-10 Nomination and selection of the highest governance body Corporate Governance

2-11 Chair of the highest governance body Corporate Governance

Case

The Company Attended the Board Meeting of the International Tin Association to Showcase Its 2-12 Role of the highest governance body in overseeing the

Thoughts on Industry Development management of impacts ESG Management

In May 2024 the International Tin Association held its first-half board meeting in Penang Malaysia GRI 2: General 2-13 Delegation of responsibility for managing impacts ESG Management

and the Company attended the meeting. The meeting primarily focused on discussing the "Tin Disclosures 2021

2030" strategy elaborating on the work plan and measures of "Tin 2030" from the perspectives 2-14 Role of the highest governance body in sustainability reporting ESG Management

of strategic framework sustainable development technology and market information. As an

2-16 Communication of critical concerns ESG Management

important producer in the tin industry

the Company expressed support for 2-17 Collective knowledge of the highest governance body ESG Management

the "Tin 2030" strategy believing it

provides clear direction for the future 2-19 Remuneration policies Employees

development of the tin industr y. In

the face of global warming energ y 2-20 Process to determine remuneration Employees

transformation and the widespread use Message from the

of smart devices the tin industry needs 2-22 Statement on sustainable development strategy Chairman

to join global counterparts to embrace

n e w o p p o r t u n i t i e s a n d f a c e n e w 2-25 Processes to remediate negative impacts Compliance Risk Control

challenges. The meeting demonstrated 2-26 Mechanisms for seeking advice and raising concerns Compliance Risk Control

the Company's reflection on industry

development and the responsibility it 2-27 Compliance with laws and regulations Compliance Risk Control

bears as an important participant in the The Company Attended the Board Meeting of

industry. International Tin Association 2-29 Approach to stakeholder engagement ESG Management

2-30 Collective bargaining agreements Employees

137 138Yunnan Tin Company Limited 2024 Sustainability Report

GRI Standards Disclosure Relevant Section GRI Standards Disclosure Relevant Section

3-1 Process to determine material topics ESG Management 305-1 Direct (Scope 1) GHG emissions Addressing Climate Change

GRI 3: Material

Topics 2021 3-2 List of material topics ESG Management 305-2 Energy indirect (Scope 2) GHG emissions Addressing Climate

3-3 Management of material topics ESG Management Change

GRI 305: Addressing Climate

201-1 Direct economic value generated and distributed Performance in 2024 Emissions 2016 305-4 GHG emission intensity Change

GRI 201:

Economic 201-2 Financial implications and other risks and opportunities Addressing Climate 305-5 Reduction of GHG emission Addressing Climate Performance due to climate change Change Change

2016

201-3 Defined benefit plan obligations and other retirement plans Employees 305-7 Nitrogen oxides (NOX) sulfur oxides (SOX) and other

significant air emissions Pollutant Emissions

GRI 203: Indirect

Economic 203-1 Infrastructure investments and services supported Rural Revitalization 306-1 Waste generation and significant waste-related impacts Waste Disposal

Impacts 2016

306-2 Management of significant waste-related impacts Waste Disposal

GRI 205: Anti- 205-2 Communication and training about anti-corruption Anti-Commercial Bribery

corruption 2016 policies and procedures and Anti-Corruption GRI 306: Effluents

and Waste 2020 306-3 Waste generated Waste Disposal

207-1 Approach to tax Compliance Risk Control

GRI 207: Tax 2019 306-4 Waste diverted from disposal Waste Disposal

207-2 Tax governance control and risk management Compliance Risk Control

306-5 Waste directed to disposal Waste Disposal

302-1 Energy consumption within the organization Energy Utilization

401-1 New employee hires and employee turnover Employees

302-3 Energy intensity Energy Utilization

GRI 302: Energy GRI 401:

Employment 401-2 Benefits provided to full-time employees that are not 2016 302-4 Reduction of energy consumption Energy Utilization 2016 provided to temporary or part-time employees

Employees

302-5 Reductions in energy requirements of products and 401-3 Parental leave Employees

services Energy Utilization

403-1 Occupational health and safety management system Employees

303-1 Interactions with water as a shared resource Pollutant Emissions

403-2 Hazard identification risk assessment and incident

303-2 Management of water discharge-related impacts Pollutant Emissions investigation Employees

GRI 303: Water

and Effluents 303-3 Water withdrawal

Water Resource 403-3 Occupational health services Employees

Utilization

2018

303-4 Water discharge Pollutant Emissions GRI 403: 403-4 Worker participation consultation and communication

Occupational on occupational health and safety

Employees

303-5 Water consumption Water Resource Health and Utilization Safety 2018 403-5 Worker training on occupational health and safety Employees

304-2 Significant impacts of activities products and services on Ecosystem and 403-6 Promotion of worker health Employees

biodiversity Biodiversity

GRI 304: Conservation 403-7 Prevention and mitigation of occupational health and

Biodiversity 2016 safety impacts directly linked by business relationships

Employees

Ecosystem and

304-3 Habitats protected or restored Biodiversity 403-8 Workers covered by an occupational health and safety

Conservation management system Employees

139 140Yunnan Tin Company Limited 2024 Sustainability Report

GRI Standards Disclosure Relevant Section Shenzhen Stock Exchange Self-Regulatory

Guidelines No. 17 for Companies Listed on

GRI 403: Shenzhen Stock Exchange—Sustainability

Article Relevant Section

403-9 Work-related injuries Employees

Occupational Report (for Trial Implementation)

Health and

Safety 2018 403-10 Work-related ill health Employees Article 22 Addressing Climate Change

GRI 404: Training 404-1 Average hours of training per year per employee Employees

Article 23 Addressing Climate Change

and Education

2016 404-2 Programs for upgrading employee skills and transition

Article 24 Addressing Climate Change

assistance programs Employees

Article 27 Addressing Climate Change

GRI 405: Diversity

and Equal 405-1 Diversity of governance bodies and employees Employees Article 28 Addressing Climate ChangeOpportunity

2016 Article 30 Pollutant Emissions

Chapter III

GRI 406: Non- Disclosure of Environmental Information

discrimination 406-1 Incidents of discrimination and corrective actions taken Employees Article 31 Waste Disposal

2016

Article 32 Ecosystem and Biodiversity

GRI 416: Conservation

Customer Health 416-1 Assessment of the health and safety impacts of product Product and Service and service categories Safety and Quality Article 33 Environmental Compliance and Safety 2016 Management

GRI 418: 418-1 Substantiated complaints concerning breaches of Data Security and Article 35 Energy UtilizationCustomer Privacy Customer Privacy

2016 customer privacy and losses of customer data Protection Article 36 Water Resource Utilization

Article 37 Circular Economy

Article 39 Rural Revitalization

Article 40 Social Contribution

Article 42 Innovation-Driven Development

Article 45 Supply Chain Due Dilligence

Chapter IV

Disclosure of Social Information Article 46 Industry Co-construction

Article 47 Product and Service Safety and Quality

Article 48 Data Security and Customer Privacy Protection

Article 50 Employees

Chapter V Article 53 Stakeholder Communication

Sustainability-related Governance Information

Disclosure Article 55 Anti-Commercial Bribery and Anti-Corruption

141 142Yunnan Tin Company Limited 2024 Sustainability Report

Independent Assurance Statement

Infaith Group (hereinafter referred to as "Infaith") has been commissioned by Yunnan Tin Company Limited (hereinafter referred 5.Reviewing Yunnan Tin's reporting processes against the AA1000 principles of inclusivity materiality responsiveness and impact

to as "Yunnan Tin") to conduct independent limited assurance of the environmental social and governance (ESG) data and to assess the appropriateness of this Assurance Statement;

information disclosed in Yunnan Tin's 2024 Sustainability Report (hereinafter referred to as the "Report") and to present the 6.Conducting sample testing of supporting evidence to verify the reliability and quality of selected performance data;

assurance findings and conclusions to the Report's readers and stakeholders via this Independent Assurance Statement. 7.Recalculating selected performance indicators to validate accuracy; and

Independence and Competence 8.Performing additional procedures as deemed necessary.

1.All members of Infaith's assurance team have no commercial relationships with Yunnan Tin that could result in conflicts of Conclusion

interest. Infaith has independently conducted this assurance engagement.

1.Based on the information provided by Yunnan Tin and our sample testing we confirm that the Report contains no material

2.Infaith's assurance team comprises industry-experienced professionals who have received specialized training in internationally misstatements.

recognized sustainability standards such as the Global Reporting Initiative (GRI) Standards AA1000AS v3 ISO 14001 ISO 26000

SA 8000 and the EcoVadis ratings for global supply chains. The team possesses comprehensive understanding and practical 2.In accordance with the AA1000AS v3 principles of inclusivity materiality responsiveness and impact our detailed assurance

experience in applying international principles evaluation frameworks and verification standards. findings are as follows:

Assurance Statement The Report demonstrates that Yunnan Tin has implemented key measures to engage stakeholders

1.The management of Yunnan Tin is solely responsible for the preparation and content of the Report. Infaith's responsibility is to Inclusivity understand their expectations and concerns and facilitate timely communication on material topics. These

conduct assurance within the scope described in this Statement and to provide professional assurance conclusions to the Report's efforts reflect a responsible and strategic approach to addressing ESG commitments.readers and stakeholders.

2.Within the limitation of the scope of assurance Infaith has performed independent limited assurance work and drawn conclusions Yunnan Tin has disclosed material topics that substantially influence its operations stakeholders decision-

in accordance with AA1000AS v3 for matters within the defined scope of the Report. Except for providing independent assurance on Materiality making and performance. It has evaluated and enhanced its approach to managing these material topics

verified facts related to these conclusions and issuing this Assurance Statement Infaith assumes no legal or other responsibility for and related performance.any inquiries for other purposes nor to any other parties who may read this Independent Assurance Statement.

3.Any questions regarding the content or related matters of this Independent Assurance Statement shall be addressed by Yunnan Tin.

Responsiveness Yunnan Tin has established policies enabling timely responses to stakeholders’ concerns.

4.In case of any discrepancies between the Chinese and English versions of this Independent Assurance Statement the Chinese

version shall prevail.Assurance Standard Yunnan Tin exhibits a robust capability to identify material topics and employs balanced effective methods

Infaith has applied the AA1000AS v3 (Type 2 moderate level of assurance) which includes evaluating Yunnan Tin's adherence to Impact for assessment and disclosure. It has established systematic processes to monitor measure evaluate and

and the extent of its implementation of the four AA1000AS v3 principles: inclusivity materiality responsiveness and impact. manage impacts supporting informed decision-making and transparent reporting of ESG performance.Scope of Assurance

3.Based on the procedures performed and evidence obtained we have no reason to doubt the reliability and quality of the selected

1. 1. The assurance scope is limited to the information and data covered in the Report pertaining to Yunnan Tin and its subsidiaries key performance indicators disclosed in the Report.

excluding data and information from suppliers contractors or other third parties.Limitation

2. The AA1000AS v3 Type 2 Moderate level of assurance was employed to assess the nature and extent of Yunnan Tin's adherence to

the four principles outlined in AA1000AS v3. The assurance engagement was conducted within the scope and locations specified in the report; and

3. Yunnan Tin and Infaith mutually agreed to select specific performance indicators from the Report for partial assurance. The As there are no internationally recognized or universally applicable standards for the evaluation and measurement of non-financial

selected key performance indicators (KPIs) include: information the use of different but equally acceptable methodologies and measurement techniques may affect comparability

with other organizations.● Investment in environmental protection ● Clean energy consumption ● Total exhaust gas emissions

● Total wastewater discharges ● Total number of employees ● Average training hours per employee

● Total investment in employee training ● Coverage rate of safety liability insurance ● Customer satisfaction For any inquiries regarding this Assurance Statement please contact us in the following ways:

Assurance Procedure and Work Performed Phone: 021-20740303

To obtain evidence supporting our conclusion we performed the following work: E-mail: esg@infaith.com.cn

1.Interviews with senior management and staff of Yunnan Tin to gain an understanding of it's overall ESG practices and related Address: 17F Tower 1 Lujiazui Riverside Center Lane 257 Binjiang Avenue Pudong New Area Shanghai China

processes;

2.Verifying key organizational developments and policy implementations as well as examining supporting evidence for the

assertions made in the Report; Authorized signature:

3.Assessing the Yunnan Tin's key stakeholders their expectations and concerns communication channels and Yunnan Tin's

responses through interviews and documentation review;

Infaith Group

4.Selecting ESG-related disclosures in the Report and performed analytical procedures evaluating overall performance and

verifying consistency with the reported information; Shanghai March 2025

143 144Yunnan Tin Company Limited 2024 Sustainability Report

Reader Feedback Form

Dear readers Open-ended Question

Hello! What are your opinions and suggestions regarding the ESG work of Yunnan Tin

Thank you very much for taking the time to read the 2024 Sustainability Report of Yunnan Tin Co. Ltd. To provide you

and other stakeholders with more valuable information and effectively promote the Company's improvement of ESG

management capability and level we sincerely look forward to your feedback and suggestions.Multiple Choice (Please check √ in the appropriate box)

1. Your overall assessment of the report:

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2. Does this report address and disclose the issues that are of concern to stakeholders

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3. How do you think Yunnan Tin has performed on environmental topics

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4. How do you think Yunnan Tin has performed on social topics

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5. How do you think Yunnan Tin has performed on corporate governance topics

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6. Do you think the information indicators and data disclosed in this report is clear accurate and complete

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7. Do you think the organization and layout design of this report are easy to read

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