2025 Sustainability Report
Contents
About This Report 01 Corporate Governance Environmental Protection Social Contribution
Message from the Chairman 03 Improving Governance Practicing Green Collaborative Innovation
01 Efficiency for Compliant 02 Operation to Build a 03 and Win-Win Building a About Us 04 and Steady Development Strong Ecological Barrier Responsible FutureAnnual Events 05
ESG Management 09
Corporate Governance 15 Addressing Climate Change 29 Innovation-Driven Development* 61
Business Ethics 24 Environmental Compliance Product and Service Safety and
ESG Performance Data Sheet 102
Management 33 Quality 68
Index Table 113
Pollutant Emissions 39 Data Security and Customer Privacy
Independent Assurance Statement 116
Waste Disposal 42 Protection 76
Reader Feedback Form 119
Energy Utilization 48 Supply Chain Management 78
Water Resource Utilization 51 Industry Co-construction and
Ecosystem and Biodiversity Exchange 83
Conservation 52 Employees 85
Rural Revitalization and Social
Contribution 982025 Sustainability Report
About This Report Data Source
The information and data disclosed in this report is obtained from the Company's internal official documents annu-
Notes to the Report al reports statistical reports as well as original operation records government public information and other formal channels. Unless otherwise specified financial data is expressed in RMB. In case of any discrepancy between this
report and the financial statements in the same period the financial statements shall prevail. This report contains
This report being the Company's 18th environmental social and governance (ESG) report details the operational no false records misleading statements or material omissions and we are responsible for the authenticity accuracy
practices and achievements in the environmental social and governance dimensions during the reporting period. and completeness of the information.It identifies key responsibility topics and responds to the core demands of the shareholders employees and
other stakeholders providing an important basis for an in-depth analysis of the compliance stability and social
contributions of the Company's operations.Report Terminology
Basis for preparation 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")
Self-Regulatory Guidelines No. 17 for Companies Listed on Shenzhen Stock Exchange — Sustainability Report
(For Trial Implementation) (hereinafter referred to as the "Guidelines") Laochang Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Laochang Branch")
Self-Regulatory Guidance No. 3 for Companies Listed on Shenzhen Stock Exchange — Preparation of Kafang Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Kafang Branch")
Sustainability Report (2026 Revised Version) Tin Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Tin Branch")
Sustainability Reporting Standards by the Global Sustainability Standards Board (GRI Standards) Copper Branch of Yunnan Tin Co. Ltd. (hereinafter referred to as "Copper Branch")
GRI Sustainability Reporting Standards by the Global Sustainability Standards Board (GRI Standards) Yunnan Hualian Zinc Indium Co. Ltd. (hereinafter referred to as "Hualian Zinc Indium")
Guide for Corporate Social Responsibility Reporting in China (CASS-ESG6.0) Wenshan Zinc Indium Smelting Co. Ltd. of Yunnan Tin Co. Ltd. (hereinafter referred to as "Wenshan Zinc Indium")
Guidance on Social Responsibility Reporting by the China National Institute of Standardization (GB/T36001-
2015) How to Get the Report
International Organization for Standardization (ISO 26000: Guidance on Social Responsibility (2010))
Study on ESG Special Report Complilation for Listed Companies Controlled by Central Enterprises This report is available in electronic form on the Company's official website (http://www.ytl.com.cn/). If you have any
questions or suggestions regarding this report please email xygfzqb@ynxy.wecom.work or call 0871-66287901.Scope of the Report
This report covers the period from January 1 2025 to December 31 2025. To enhance the comparability and Special Notice
completeness of the information in the report appropriate retrospection or extension may be made to some
contents. The organizational scope covers Yunnan Tin Co. Ltd. and its subsidiaries and branches. This report is available in both Chinese and English. In case of any discrepancy between the two versions the Chi-
nese version shall prevail.
01 022025 Sustainability Report
Message from the Chairman About Us
The world is undergoing profound changes and sustainable development has become the core of enterprises' long-
term competitiveness. As a global leader in the tin and indium industry Yunnan Tin shoulders the era mission of Company Profile
safeguarding resource security and driving green transformation. Environmental social and corporate governance
(ESG) is the strategic cornerstone for us to address challenges and plan for the future.
Yunnan Tin Co. Ltd. (stock abbreviation: "Yunnan Tin" stock code: 000960) is a state-owned listed company
controlled by Yunnan Tin Group (Holding) Co. Ltd. Approved by the People's Government of Yunnan Province
Governance Upgrading to Lead the Strategic Core in 1998 the Company was jointly established by five sponsors including Yunnan Tin Corporation and Gejiu Xidu Nonferrous Metals Processing Factory.In October 1999 the Company was approved by the China Securities Regulatory Commission to issue ordinary
In 2025 the Company completed the upgrading of its governance structure and renamed the "Strategy and shares of 130 million RMB to the public for the first time and was officially listed on the Shenzhen Stock Exchange in
Investment Committee" of the Board of Directors as the "Strategy Investment and Sustainable Development (ESG) February of the following year. As the only listed company in China's A-share market covering the entire tin industry
Committee". This established the strategic core position of ESG at the highest decision-making level ensuring its chain Yunnan Tin occupies a leading position in the global tin industry.integration into the Company's full value chain decision-making. This marks the 18th consecutive year that we
have released a sustainability report. By enhancing disclosure quality and conducting independent assurance we The Company has an integrated industrial structure that spans the entire supply chain of exploration mining
demonstrate a transparent and accountable Yunnan Tin to the world. dressing and smelting of non-ferrous metals such as tin indium zinc and copper with its reserves of tin and indium resources ranking first in the world. As a leading enterprise in the world's tin industry the Company has the largest
tin production and processing base in China and the longest and most complete tin industry chain in the world and
represents the leading level of the world's tin industry.Green Transformation to Consolidate the Foundation of Development At present the Company's main products include tin ingots cathode copper zinc ingots zinc die cast alloys indium ingots etc. Yunnan Tin New Material Co. Ltd. an important joint-stock enterprise specializes in the production of tin
materials and tin chemical products. The Company has an overall production capacity of 80000 tons of tin smelting
125000 tons of cathode copper 100000 tons of zinc smelting 50000 tons of zinc die cast alloys and 105 tons of
We are firmly advancing green and low-carbon development. At the mining end we are fully committed to building indium smelting. Yunnan Tin New Material Co. Ltd. has an annual production capacity of 43000 tons of tin materials
green mines and improving the efficiency of comprehensive resource utilization. At the smelting end we are and 27100 tons of tin chemical products.vigorously developing a circular economy aiming to achieve a comprehensive utilization rate of solid waste from
tin smelting of not less than 90%. Taking full advantage of Yunnan's green power resources we will ensure carbon The Company's trademark "YT" registered on the London Metal Exchange (LME) has become a well-known brand
peaking by 2030. We continue to invest in the in-depth treatment of mine water inflow smelting waste gas and solid in the international tin product market. Since 2005 the Company's sales volume of tin products has maintained the
waste and adhere to the bottom line of ecological environment protection. first place in the world for consecutive years.People Orientation to Practice Social Responsibility
We put the safety and health of employees first. By strengthening the responsibility system improving intrinsic
safety and building a professional emergency rescue team we are committed to achieving the goal of "zero severe
injuries". We actively give back to the community participate in public welfare and ecological restoration and build
a harmonious and symbiotic community relationship.Faced with a complex external environment our confidence stems from our adherence to technological innovation
and industrial chain collaboration. We drive green production through technological innovation and ensure supply
chain stability by extending upstream. A sound ESG management system provides a solid guarantee for us to address
risks and seize opportunities.Looking to the future Yunnan Tin will continue to be guided by ESG and transform its sustainable development
blueprint into tangible competitive advantages. We aspire to become a green benchmark in the industry and work
hand in hand with all colleagues to build a sustainable and bright future for the tin industry.Chairman of Yunnan Tin Co. Ltd.
03 042025 Sustainability Report
Annual Events
ESG rating breakthrough: Ranked in the leading echelon of the industry with the Wind ESG rating jumping Environmental honors: Tin Branch won the national honor of "Green Manufacturing" and was successfully
from BBB to A for the first time. rated as a national green factory.External ESG recognition: Selected into the list of "China's Top 100 ESG Pioneer Listed Companies (2025)". Green design: The project of "Green Utilization Complete Technology for Hazardous Solid Waste from Tin
Metallurgy" won the First Prize of Science and Technology Progress Award of Yunnan Province.Information disclosure and governance practices: Awarded the highest Grade A in information disclosure
by the Shenzhen Stock Exchange for two consecutive years; selected into the "Best Practice Cases of the Leading the establishment of low-carbon standards: Successfully approved the project of "Yunnan Tin
Board of Directors of Listed Companies in 2025" and "Outstanding Sustainable Development Practice Cases Industry Enterprise Carbon Emission Standardization Pilot" the first national-level pilot in the domestic tin
of Listed Companies in 2025" by the China Association for Public Companies (CAPCO) with its governance industry. This marks the Company's leap from a forerunner in low-carbon practice to a leader in formulating
efficiency receiving authoritative recognition. industry rules and standards.Deepening of investor relations: Successfully held the 2024 Annual General Meeting of Shareholders and Green Mine Development: Datun Tin Mine has been selected for the Yunnan Provincial Green Mine List.three extraordinary general meetings throughout the year to protect the rights of shareholders. Actively Meanwhile Hualian Zinc Indium has successfully passed the provincial on-site review for the national-level
participated in international platform dialogues such as the London Metal Exchange (LME) Asia Annual green mine selection and has been recommended for inclusion in the national green mine list participating
Meeting to strengthen communication with global investors. in the national-level green mine selection process.Sound business performance: In the first half
of the year the Company achieved considerable
National-level honor and commendation: Lan Xixiong an economic benefits and exceeded phased goals
国家级荣誉表彰：职工兰希雄荣获 " 全国劳动模范 " 称号，体 employee of the Company was awarded the title of "National by accurately implementing the "Five Linkages"现了公司一线员工卓越的技术水平与奉献精神。 Model Worker" which embodies the outstanding technical strategy fully demonstrating its outstanding abilityproficiency and dedication of the frontline employees of the to respond to market risks and create benefits.技能提升与团队荣誉：积极承办云南省职工职业技能大赛资源 Company.经济板块赛事；大屯锡矿选矿车间荣获云南省 " 工人先锋号 " Consolidating the leading position in the称号，彰显了公司在高技能人才培养与团队建设方面的成果。 Skill enhancement and team honors: Undertook the industry: Wenshan Zinc Indium was awardedresource economy section of Yunnan Provincial Staff Vocational the title of "the 5th Batch of Manufacturing Single
Skills Competition actively; the Dressing Workshop of Datun Champion Enterprises in Yunnan Province" for its
Tin Mine was awarded the title of Yunnan Provincial "Worker outstanding contributions in the field of primary
Vanguard" demonstrating the Company's achievements in the Corporate Environmental indium (indium ingots). cultivation of highly skilled talent and team building.Governance Protection Comprehensive upgrade of product brands: The "YT" tin ingots were awarded the highest-
System Optimization Green Leadership and level title of "Excellent Brand Product"; both
and Market Recognition Standard Establishment "Yunnan Tin" cathode copper and zinc ingots were rated as "High-Quality Brand Products"
significantly enhancing brand influence and
market competitiveness. The "YT" brand silver
ingots have been successfully registered with the
Shanghai Futures Exchange further enhancing
their competitiveness in the silver market.Social Economic
Contribution Achievement
Employee Steady Operation and
Development and Brand Upgrade
Heritage of Honors
05 062025 Sustainability Report
Corporate Governance Social Contribution
Average Attendance Rate of the Meeting of the Strategy Investment and Sustainable
Board of Directors Development (ESG) Committee Ethnic Minority Employees Annual Employee Training Expenditure
100% 4 Times 4661 People RMB 13.2293 Million
Proportion of Female Senior Convening Frequency of the
Executives General Meeting of Shareholders Total Investment in Safety Production Qualified Rate of Supplier Assessment
14.3% 4 Times RMB 326.7598 Million 100%
Proportion of Employees Who Signed ESG Training Frequency Research and Development Expenditures
the Integrity Commitment
100% 1 Times RMB 440.5225 Million
Patents Product Percent of Pass
Environmental Protection 485 Items 100%
Total Investment in Environmental Management Customer Satisfaction Training on Data Security and
Survey Results Customer Privacy Protection
RMB 358.08 Million
97.57Points 3 Times
Consumption of Self-generated Renewable Electricity
y the Numbers: 202 Number of Participation 99367 B 5 in Employee Volunteer Total Investment in Rural MWh Activities Revitalization
Proportion of Clean Energy Consumption in Total 1708 People RMB 2.28 Million
Comprehensive Energy Consumption
54 Number of Beneficiaries of Rural Revitalization Work %
11660People
Water Circulation and Reuse Rate Waste Recycling Rate
94.30% 8.20% Economic Achievement
Operating Income Net profit attributable to shareholders of the
GHG Emissions Reduced due to Emission Reduction Mine Ecological Restoration Area listed company
Measures
61796 43.535 Billion 1.966 BilliontCO2e 107.80 Ha
07 082025 Sustainability Report
ESG Management Stakeholder Communication
ESG Governance Structure The Company continuously optimizes the stakeholder communication mechanism and proactively identifies and responds to the core concerns and expectations of internal and external parties through normalized communication
channels so as to enhance mutual trust build consensus and provide support for the continuous improvement of
The Company is continuously committed to achieving the unity of social and economic benefits and systematically the ESG management system.integrates the fulfillment of sustainable development responsibilities into its operation and management. During
the reporting period the Company formulated and implemented the Sustainable Development Management
System clarifying its responsibilities and obligations in environmental social and governance aspects. The Company
has established a sustainable development governance structure covering the Board of Directors the Strategy Stakeholders Expectations and Demands Communication and Response
Investment and Sustainable Development (ESG) Committee and the Investment and Sustainable Development
(ESG) Management Review Group. The Securities Department is responsible for daily liaison and coordination and
all departments of the headquarters all branches and subsidiaries cooperate to jointly promote the systematic
development of sustainable development work. Shareholders and Economic Performance General Meeting of Shareholders
Senior Manage- Corporate Governance Board Meetings Financial Reports
ment Compliance Risk Control Business Reports Roadshows and
ESG Governance Structure and Rights & Responsibilities Business Ethics Communication with the Company etc.As the highest responsible body for sustainable development management and information
disclosure the Company's Board of Directors is fully responsible for deliberating and approving Government and Corporate Governance Regular Communication and Reporting the Company's sustainable development strategic plan relevant governance structures and Business Ethics Institutional Research Policy
important systems and ultimately examining and approving the sustainable development Regulatory Agen-
Board of cies Environmental Management Implementation Information Disclosure information disclosure report and the public disclosure of major information. At the same time
Directors Waste Discharges etc. the Board of Directors is also responsible for deliberating the response plans for sustainable
development-related risks and negative events that have a significant impact on the Company.R&D and Innovation
Supply Chain Management On-site Communication Market
As a research and guidance body for sustainable development work the Strategy Investment Customers and Supply Chain Due Diligence Surveys Supplier Training Transparent and Sustainable Development (ESG) Committee under the Company's Board of Directors is
mainly responsible for researching and putting forward suggestions on the Company's long- Suppliers Management Procurement Customer Satisfaction
term development strategy major investment decisions and the overall management of Product Quality Surveys etc.sustainable development. Privacy and Data Security
In addition the Committee is responsible for identifying the Company's sustainable
Strategy
Investment development-related risks and opportunities researching analysis and risk assessment on ESG Employees' Rights Interests and
and matters guiding and supervising the formulation and implementation of relevant systems and
Sustainable goals and providing decision-making consulting on governance vision goals policies and so Employees Benefits Employee Activities Employee Training
Development on. Employee Development and Training Employee Handbook etc.
(ESG) Occupational Health and Safety
Committee Furthermore the Committee is responsible for organizing and coordinating the supervision and
inspection of sustainable development policies management performance and goal progress
and deliberating the Company's strategies risks and implementation work in specific fields
such as greenhouse gas emission reduction climate change water resource protection and
governance biodiversity technological innovation and social contribution and putting forward
corresponding suggestions.Partners Industry Conferences Strategic Industry Co-construction and Exchange Partnerships Exchange Visits etc.General Manager serves as the Leader of the Investment and Sustainable Development (ESG)
Management Review Group.Be responsible for formulating sustainable development strategic plans and relevant systems
Investment and policies; constructing sustainable development management system and indicator
and system and organizing the development of sustainable development information disclosure
Sustainable
Development work; implementing the Company's sustainable development strategies and responsibilities; Ecological Environmental Protection Community Volunteer Activities Social
(ESG) maintaining regular communication with stakeholders and regularly identifying material topics; Community the Public Media etc. Community Public Welfare Welfare Programs Social Undertaking Management paying attention to external sustainable development trends and policy dynamics; organizing Investor Relations Management Support Programs etc.
Review Group relevant internal trainings; fulfilling other matters assigned by the Board of Directors and the
Strategy Investment and Sustainable Development (ESG) Committee.
09 102025 Sustainability Report
Analysis of Topics of Double Materiality Matrix of Topics of Double Materiality of Yunnan Tin
Significance
The Company systematically collects stakeholders' views on ESG issues through special questionnaires and screens 2 1
out key topics based on the dual dimensions of "impact materiality" and "financial materiality" to ensure the
professionalism and materiality of the report content. Relevant key topics have been disclosed in a concentrated 5 4
manner in the report. 3
6
912
19
82414
Topic Materiality Analysis Process 10
217
2311
Understand the Company's activities and business relationships
13181622
The Company systematically analyzes its operations industrial chain relations external environment 20
and the concerns of major stakeholders which lays a foundation for materiality assessment. 17
15
Insignificance Materiality to the financial performance of Yunnan Tin Significance
Identify ESG topic pool
Environmental Social Governance
With the Guidelines of the Stock Exchange as the core framework and with reference to industry
practices and mainstream rating standards the Company identifies potential issues analyzes their
related impacts risks and opportunities and forms the Company's ESG topic pool. 1 Addressing Climate Change 9 Rural Revitalization 17 Corporate Governance
2 Pollutant Emissions 10 Social Contribution 18 Due Diligence
3 Waste Disposal 11 Innovation-Driven Development 19 Stakeholder Communication
Ecosystem and Biodiversity Supply Chain Management Anti-commercial Bribery and Assess and rank the materiality of topics 4 Conservation 12 20 Anti-corruption
Environmental Compliance Equal Treatment of Small and
5 Management 13 Medium-Sized Enterprises 21 Anti-unfair Competition
The Company evaluates and ranks the topics from the dual dimensions of impact materiality and
financial materiality through questionnaires interviews and other methods and forms a double 6 Energy Utilization Product and Service Safety and 14 22 Compliant Operations
materiality matrix. Quality
Water Resource Utilization Data Security and Customer 7 15 Privacy Protection 23 Party Building
8 Circular Economy 16 Employees 24 ESG Management
Confirm and report the materiality of topics Linkage of ESG Performance with Senior Management Remuneration
Combined with the deliberation opinions of the management the Company confirms and adjusts the The remuneration assessment of senior management of Yunnan Tin adopts an assessment system that combines
results of material topics and discloses them as key content in the annual ESG report in accordance quantitative assessment with qualitative evaluation unifies objective assessment with comprehensive evaluation
with the requirements of the Guidelines. and links assessment results with rewards and punishments. Relevant assessment indicators are clarified by signing the annual business performance responsibility letter with the Company which are mainly linked to R&D investment
unit product energy consumption control corporate informatization construction work safety ecological
environmental protection etc. An incentive and restraint mechanism matching occupational risks and post value
and linking with performance assessment results and the completion of key work has been established.
1112
Materiality to the economic social and
environmental impacts2025 Sustainability Report
01
Corporate Governance:
Improving Governance
Efficiency for Compliant and
Steady Development
Corporate governance is the fundamental guarantee for
the sustainable development of an enterprise. Yunnan
Tin continuously optimizes the governance structure and
internal control system strengthens risk prevention and
compliant operation adheres to the bottom line of business
ethics and is committed to building a standardized
efficient and transparent governance mechanism to provide
a solid guarantee for high-quality development.Corporate Governance
I nternal Control Risk and Compliance Management
(Topic of Financial Materiality)
Business Ethics
13 142025 Sustainability Report
Corporate Governance
The General Meeting of Shareholders is the highest authority of the Company which
Governance Structure exercises core functions and powers such as major decision-making election of directors and deliberation of profit distribution in accordance with the law. The General Meeting
of Shareholders operates in strict accordance with laws regulations and the Articles of
Yunnan Tin strictly abides by the Company Law of the People's Republic of China Securities Law of the People's General Association implements the system of annual and extraordinary meetings and adopts a
Republic of China Code of Corporate Governance for Listed Companies and other laws regulations and regulatory Meeting of combination of on-site and online voting to facilitate shareholder participation. At the same
requirements. With the Articles of Association of Yunnan Tin Company Limited as the core the Company has Shareholders time the Company attaches great importance to the protection of the rights and interests
established and improved a modern governance structure including the General Meeting of Shareholders the Board of minority shareholders. When deliberating on major matters affecting their interests it
of Directors and the management forming a standardized scientific and effective corporate governance mechanism conducts separate voting and disclosure and elects directors through the cumulative voting
with clear rights and responsibilities. system to ensure the openness fairness and impartiality of corporate governance and
effectively safeguard the legitimate rights and interests of all shareholders.公司组织架构
General Meeting
of Shareholders
Audit Committee
The Board of Directors consists of nine directors with specialized committees including the
Performance and Compensation Strategy Investment and Sustainable Development (ESG) Committee the Audit Committee
Committee Board of the Nomination Committee and the Performance and Compensation Committee under it.Directors The Board of Directors in strict accordance with the Articles of Association of Yunnan Tin
Board of Company Limited is responsible for convening the General Meeting of Shareholders and
Nomination Committee Party Committee of Director implementing its resolutions determining the Company's business plans and investment the Company plans formulating basic management systems appointing senior management personnel
managing information disclosure matters and supervising the performance of duties by each
Strategy Investment and special committee in strategic planning internal control director selection remuneration
Sustainable Development incentives and ESG governance to ensure the standardized and effective operation of the
(ESG) Committee Company's governance system.
General Manager Secretary of the
Board of Directors
Key Performance
Deputy General
Manager
During the reporting period the Company held 7 meetings of the
Board of Directors with a 100% attendance rate of directors;
6 meetings of the Audit Committee 3 meetings of the Nomination
Committee 3 meetings of the Performance and Compensation
Committee and 4 meetings of the Strategy Investment and The Company Was Awarded the Best
Practice Case of Board of Directors of
Listed Companies in 2025
Sustainable Development (ESG) Committee were held.
1516
Discipline Inspection Group in the Company
Accredited by the Discipline Inspection Commission Comprehensive Office of Discipline
of Yuntin Tin Group Holding Co. Ltd. Inspection Group
Supervision Comprehensive Governance and Stability
Maintenance Office
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 Department2025 Sustainability Report
Diversity of the Board of Directors Investor Relations Management
The Company attaches importance to the diversity and balance of the composition of the Board of Directors. The Company attaches great importance to investor relations management aiming to enhance investors'
Although no independent policy has been formulated factors such as professional background industry experience understanding and recognition of the Company through a standardized transparent and efficient communication
age and gender are comprehensively considered in the director selection process to improve the scientificity of mechanism and safeguard the legitimate rights and interests of investors. The Company strictly abides by laws
decision-making and governance efficiency. The current Board of Directors has 9 members with professional regulations and regulatory requirements upholds the basic principles of compliance equality initiative and honesty
backgrounds covering law finance enterprise management mineral resources and other fields with a reasonable and is committed to building a long-term and stable investor relationship improving governance level and enterprise
age and professional experience structure. During the reporting period one director was replaced. The new director value and realizing the common development of the Company and investors.has expertise in mineral resources management further enhancing the overall capacity and industry adaptability of
the Board of Directors.Relevant Measures for Investor Relations Management
System and Organization Construction
The Company revised and improved the Investor Relations Management System clarifying that
the Secretary of the Board of Directors is the person in charge of investor relations and the
Securities Department is responsible for the specific implementation. The system establishes the
basic principles of compliance equality initiative and honesty and builds a systematic working
Liu Luke Non-ferrous metal mining Li Shiyong Legal affairs Zhang Yang Board Secretary mechanism including file management and personnel training.smelting deep processing and enterprise related experience（Male） supply chain and （Male） management （Male） and enterprise
enterprise management management
Information Disclosure and Communication Channels
The Company proactively communicates with investors on the Company's strategy operation
ESG performance and other aspects through various channels such as the General Meeting of
Shareholders the investor column on the Company's official website the interactive e-platform
investor briefings performance briefings roadshows and on-site research and ensures that the
communication content does not replace or exceed the legally disclosed information.Huang Shi Mineral resources Chen Xiongjun Marketing and Li Dening Finance and
management enterprise strategic（Male） and enterprise （Male） management （Male） development
management Investor Participation and Rights Protection
The Company attaches great importance to the participation right and right to know of investors
especially minority investors. The Company proactively solicits the opinions of minority
shareholders before deliberating on major matters such as profit distribution. A dedicated
telephone fax and email have been set up to ensure smooth communication channels and timely
response to investors' demands.Yuan Rongli Accounting Wang Daobin Analysis and finance Yu Dingming Legal education
financial education of the non-ferrous and legal service
（Female） and financial （Male） metal industry （Male）management Standardized Management of Specific Institutions and Media
The Company has established strict reservation recording and verification procedures for activities
Key Performance such as accepting research and analyst meetings and requires relevant parties to sign a letter of commitment to prevent the leakage of undisclosed major information and insider trading. In
cooperation with news media the Company clearly distinguishes between objective reports and
publicity materials to ensure the accuracy and fairness of information transmission.Key Performance
During the reporting period the Company's Board of Directors had 9 members including 3 independent File Management and Capacity Improvement
directors and 1 female director. The Company establishes a complete file for all types of investor relations activities with a retention
period of not less than three years. At the same time the Company carries out investor relations
management training for controlling shareholders directors senior management personnel and
relevant personnel to improve the standardization and professionalism of the overall operation.
17 182025 Sustainability Report
Key Performance Information Disclosure
The Company attaches great importance to the standardization and effectiveness of information disclosure and
During the reporting period the Company organized and participated in a total of 92 investor exchange strictly abides by the Securities Law of the People's Republic of China Administrative Measures for Information Disclosure of Listed Companies and other laws regulations and relevant regulatory requirements. In 2025 the
347 Company once again won the highest rating "Grade A" in information disclosure by the Shenzhen Stock Exchange activities and established relationships with institutional investors; due to its high-quality information disclosure work effective investor relations management continuous and stable
170 181 returns to shareholders and outstanding ESG practice performance winning this evaluation for two consecutive investor calls were answered in total; questions raised by investors were replied at irm.cninfo.com. years. Among the 5367 listed companies participating in the evaluation only 18.65% were awarded Grade A which is
a high recognition of the Company's quality and transparency in terms of information disclosure.cn with a 100% reply rate.Case Research and Exchange with Institutional Investors: Transparent Communication for Value Transmission
In July 2025 the securities firm actively organized 18
institutional investors to attend the on-site research
and discussions at the Company. The Company's
management conducted in-depth sharing and exchange
on the development trend of the tin industry the first half-
year operation resource guarantee ESG-related topics
and development planning. Investors also visited mining
and smelting units on the spot to learn about the progress
of resource exploration tailings utilization and intelligent
production in detail. Through transparent and two-way
communication this activity effectively conveyed the
Company's value and development potential reflecting Returns to Shareholders
the Company's close attention to investor relations
management and firm determination to promote high-
quality development. The Company Holds an Investor Forum and Exchange The Company attaches great importance to returns to shareholders and actively shares operating results with Meeting shareholders while taking into account the sustainable development. The Company fulfills its commitment to
shareholder returns and conveys long-term investment value through a sustained and stable dividend mechanism.At the same time to fully respond to the call of the Party Central Committee for "maintaining the stable operation
of the capital market firmly holding a long-term optimistic view of China's economy and resolutely supporting the
capital market" the Company implemented a share repurchase in 2025.Case Innovative Communication for Value Leadership
Profit distribution period Allocation scheme Distribution amount (RMB)
In April 2025 the Company held the 2024 Annual
Performance Briefing in the form of "on-site + live January 2025 Cash dividend of RMB 1.00 per 10 shares (including tax) 164580195.20
broadcast". The Company conducted in-depth exchanges
with investors on annual performance industry outlook
ESG achievements and future strategies and innovatively April 2025 Cash dividend of RMB 1.90 per 10 shares (including tax) 312702370.88
presented the Company's value through AI digital
humans video connections and other methods. The
release of the Company's annual sustainability report January 2026 Cash dividend of RMB 1.10 per 10 shares (including tax) 180997514.72
and the progress of ESG-related work were highlighted
at the meeting. As a listed company that has held April 2026 Cash dividend of RMB 2.5 per 10 shares (including tax) 411357988.00
performance briefings for five consecutive years and
has been awarded the best practice case the Company
is committed to conveying long-term investment value
improving governance transparency and actively repaying Market value maintenance
market trust through high-quality and diversified investor The Company Holds an Annual Report Performance
communication. Briefing and Investor Communication Since 2025 the market value of Yunnan Tin Company Limited has shown an overall fluctuating upward trend. By the
end of 2025 the company's total market value has risen from RMB 23 billion to RMB 45.6 billion with an increase of
99% successfully ranking among the Wind 2025 Annual "Top 500 Market Value of Chinese Listed Enterprises" list.
19 202025 Sustainability Report
Internal Control Risk and Compliance Management* Impact Risk and Opportunity Management
Compliant operation and risk control form the solid foundation for a company's sustainable development. Yunnan The Company continuously carries out systematic risk identification analysis and assessment work. Combined
Tin integrates ESG concepts into its internal control and risk management system and continuously improves the with the results of risk assessment the Company comprehensively adopts a combination of manual and automated
risk management process through system optimization and informatization construction so as to comprehensively controls as well as preventive and detective controls. Through various control measures such as segregation of
enhance the ability of risk identification and response. incompatible duties authorization and approval accounting system control asset protection budget management
operation analysis and performance assessment all types of risks are controlled within an acceptable range.Governance
The Company strictly abides by the Company Law of the People's Republic of China Securities Law of the People's
Republic of China and other relevant laws and regulations and has formulated management systems including nd C a g ol
the Internal Control Management System Compliance Management Measures and Internal Audit Management ing nin I ln ect
Provisions . Led by the Board of Directors and supervised by the Audit Committee the Company has officially put ito
r
Wa
r fo
r
io
m n
into operation the integrated "internal control risk management and compliance" management system. This further nMo rly a
o
t f
improves the internal control and risk prevention mechanism enhances the standardization of internal governance Ea
io Rn i sk
strengthens all staff's awareness of risk and compliance and effectively guarantees the compliance of all business
activities and the stability of operation. Risk
Management
Process
Board of Audit and All Departments and Risk Control Subsidiaries Under
Directors Department the Company
Risk
Audit Assessment
Committee
Risk Identification Method
Strategy
The Company has established a full-process risk management mechanism covering key links such as risk information Conduct item-by-item analysis of Each business department Combined with the actual
collection risk identification risk assessment risk response and monitoring and early warning. The results of the financial statements to identify regularly collects relevant cases situation of different
annual risk management review are submitted to the Audit Committee for review and approval in accordance with potential risks in business occurring in the Company or risks faced by different
regulations and reported to the Board of Directors promptly after approval so as to ensure the effective operation of activities from abnormal items. the same industry organizes departments of the Company
risk management work under a standardized and transparent governance framework. Through comparison and analysis middle and senior management design questionnaires
of financial ratios identify personnel to conduct discussions distribute them to relevant
Internal Control Compliance and Risk List of Yunnan Tin existing problems and risk points and identifies risks by analyzing post personnel for filling of the Company in profitability negative factors that hinder the and conduct risk statistics
and asset operation capacity. achievement of goals in the cases. based on the filling results to
Risk Type Risk Description Possibility Potential Financial Impact Impact Cycle1 identify risks.Failure to establish a risk assessment
Failure to establish a risk mechanism may trigger capital loss asset
Financial statement Questionnaire survey
impairment cost out of control and other Short- analysis method
Case analysis method method
Risk assessment mechanism may term
Management lead to insufficient attention to Low problems; may also face penalties due to
Risk certain major risks resulting in non-compliance causing direct economic
medium-
term &
ineffective risk prevention. losses while affecting operational efficiency and damaging the Company's long-term Through in-depth Group discussions or Identify risks through on-
financial security and profit stability. interpretation of the interviews integrate the site inspections of all
Failure to track interpret and Company's business knowledge and experience departments of the Company.understand the latest laws The Company may face administrative processes describe the of management personnel
and regulations issued by the fines and tax arrears repayment for business processes in detail employees and other relevant
government may result in violating new regulations and miss out Short- with graphical methods personnel.Legal Com- insufficient awareness of the on policy preferential treatments and term analyze the internal and
pliance Risk government's latest legal and Low subsidies; the risk may trigger compliance medium- external factors affecting
regulatory policies and require- disputes and compensation expenses term & the entire detailed modules
ments and failure to timely causing direct economic losses and long-term accordingly and then identify
propose measures to reduce eroding the Company's operating profits. risk factors.the Company's risks.
1：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years Flow chart method
Group discussion and On-site inspection
interview method method
2122
Iden Rti ifi skca tion
isk R nse
Resp
o2025 Sustainability Report
Case Deepen Digital and Intelligent Audit and Legal Compliance Training to Consolidate the Foundation of Risk Management and Sustainable Development Business Ethics
In May 2025 the Company organized personnel from the internal control risk control legal affairs
compliance and internal audit lines to carry out a special training on "Digital and Intelligent Audit and Anti-corruption and Anti-commercial Bribery
Legal Risk Compliance of Mining Enterprises". The training content covers key areas such as the application
of digital audit technologies practical operation of the Audit Committee identification of financial fraud The Company attaches great importance to the construction of integrity education and anti-fraud mechanisms
and interpretation of the newly revised Mineral Resources Law of the People's Republic of China aiming and continuously improves internal systems such as the Anti-fraud Management System Compliance Manual
to improve the audit efficiency and strengthen the ability of legal compliance and risk management. and Compliance Guidelines for Anti-Overseas Corruption and Anti-commercial Bribery and clearly designates
Through systematic learning and practical assessment this training has enhanced the professional the Comprehensive Office of Discipline Inspection Group as the permanent anti-fraud institution. By urging all
capabilities of relevant personnel in compliant operation risk prevention and control and sustainable employees and management personnel to strictly abide by the relevant rules and regulations of the higher-level
mining management providing a solid support for the Company's law-based and compliant operation and discipline inspection commission and the Provisions on the Recording and Filing of Interference in the Normal
sustainable development. Operation and Management Activities of Enterprises (Trial) the Company has effectively standardized its operation
and management behaviors systematically prevented and controlled fraud and corruption risks and ensured the
standardized honest and efficient operation of production and business activities.Case Cultivate Legal Compliance Awareness to Build a Strong Defense Line for Risk Prevention and Control and Compliant Operation
Core Clauses of the Anti-fraud Management System
To continuously improve the ability of enterprise management in accordance with the law the Company
organized a special legal compliance training in December 2025 covering the headquarters and all affiliated
subsidiaries in the form of video conferences. The training focused on practical content such as legal risk Accountability and Remedy Mechanism: If a fraud incident occurs due to poor management the
prevention and control in bidding and tendering analysis of common risks in enterprise operation and the relevant competent leaders shall bear management responsibilities. Management personnel who have
construction of compliance systems and invited external legal experts and internal compliance person-in- committed irregular operations or decisions within their scope of duties shall also be held accountable.charge to give joint lectures. Through a systematic and full participation training mechanism the Company For business units where problems have occurred the Company will conduct a comprehensive
has further strengthened the legal literacy and compliance awareness of business personnel laying a solid assessment and improve internal control. At the same time all business contacts with customers
foundation for promoting high-quality development on the rule of law. suppliers and other relevant parties are required to abide by the principles of integrity and fairness and transmit anti-fraud requirements promptly.Case Establish the Integrated "Internal Control Risk Management and Compliance" Management System Disciplinary Measures and Handling Procedures: Through a clear disciplinary procedure and handling to Consolidate the Foundation of Comprehensive Risk Prevention and Control and Governance mechanism continuously improve the governance level and ensure the effective implementation of the
system. Those suspected of violating laws and crimes shall be transferred to judicial organs in accordance
In 2025 the Company systematically promoted the revision and evaluation of the integrated "internal with the law.control risk management and compliance" management system. Guided by the State-owned Assets
Supervision and Administration Commission's control objectives of "strengthening internal control
preventing risks and promoting compliance" the Company integrated and sorted out a risk database
and an internal control and compliance manual covering 26 core business processes. By integrating the Follow-up of Report Information and Internal Audit: The Company continuously follows up on report
requirements of laws and regulations process control and post responsibilities a unified coordinated and information and internal audit findings implements rectifications promptly constantly optimizes the
operable management mechanism has been established which has strengthened compliance review and supervision and internal control mechanism strives to create a clean upright steady and compliant
responsibility implementation in key areas promoted the transformation of the internal control system from business environment and consolidates the foundation for the sustainable development of the
decentralized construction to systematic integration and provided systematic support for improving the enterprise.Company's governance efficiency preventing operational risks and ensuring sustainable and high-quality
development.Metrics and Targets
The Company has established a strategy-oriented fully covered and systematically integrated risk management
system with the overall control objectives of "strengthening internal control preventing risks and promoting
compliance". The Company is committed to improving the effectiveness of risk prevention and control and
management coordination through continuous risk monitoring process optimization and compliance embedding
so as to ensure operational safety and sustainable development.
2025 Annual Objectives Achievement
Organize and complete the risk assessment of 11 departments (centers) and 15 affiliated
units and formed risk assessment reports. Achieved
23 242025 Sustainability Report
Case Make Efforts to Improve Party Conduct and Build a Clean State-owned Enterprise Anti-unfair Competition and Anti-monopoly
To continuously deepen the full and strict governance over the Party the Company held a Party Integrity The Company strictly abides by the relevant national laws and regulations on anti-monopoly and anti-unfair
Construction and Anti-Corruption Working Conference in February 2025 thoroughly studied and competition adheres to participating in market competition fairly and legitimately and explicitly prohibits all
implemented the guidelines of the plenary sessions of the Central Commission for Discipline Inspection monopolistic and unfair competition acts. The Company requires that no agreements restricting competition be
and the provincial Commission for Discipline Inspection systematically summarized the achievements reached with competitors and strictly prohibits employees from disclosing sensitive information such as costs and
in 2024 and deployed the key annual tasks. The meeting clarified the directions such as strengthening market plans in communications. In operation the Company eliminates the abuse of dominant market position and prohibits acts such as unfair pricing restricted transactions tying sales or differential treatment. In case of
political supervision deepening Party discipline concentration of business operators such as mergers and acquisitions the Company shall perform the declaration
education maintaining a high-pressure posture obligation in accordance with the law and shall not implement relevant transactions without approval. At the same
against corruption and compaction of the "two time the Company advocates healthy competition abides by business ethics in bidding and business development
responsibilities" and signed responsibility letters for eliminates malicious bidding commercial defamation and false publicity and actively maintains a healthy and
the construction of a clean and honest party conduct orderly market environment.and government on the spot. Through systematic
planning and responsibility implementation the
Company strives to promote the in-depth and solid
development of the construction of a clean enterprise Key Performance
providing a solid disciplinary guarantee for high-
quality development and building a world-class
enterprise. Party Integrity Construction and Anti-corruption Working In 2025 the number of negative incidents of the The Company achieved a 100% signing
Conference in 2025 Company in violation of business ethics principles
such as corruption bribery money laundering rate for the Commitment to Compliance and
unfair competition insider information leakage Integrity.conflict of interest and connected transactions
was zero.Case Party Lectures on Integrity Strengthen Disciplinary Awareness
The Company continuously promotes integrity education
and discipline construction and carried out special Party
lectures on integrity for grass-roots Party branches in 2025
to strengthen the awareness of work style and discipline
concept. The course emphasized the stubbornness and
recurrence of the "Four Malfeasances" (favoring form over
substance bureaucratism hedonism and extravagance)
and guided Party members and employees to engage in
work with an honest nature and a pragmatic work style.After the lectures research on Party building and the
implementation of practical things was carried out to
promote the full and strict governance over the Party to
extend to the grass-roots level enhance the awareness of
honest performance of duties and responsibility of front-
line organizations and help achieve the annual goals. The Company Carries out a Party Lecture on Integrity
Report Tel.: 0871-64983008
Whistleblower Protection
To effectively supervise and prevent corrupt acts the Company has set up special reporting
channels including a dedicated reporting mailbox and a reporting hotline encouraging
all employees and stakeholders to actively report acts suspected of violating business
ethics and anti-corruption principles especially clues of bribery or corruption in any
form. The Company continuously tracks and monitors the problems found in the report
information and internal audit and takes corresponding rectification measures promptly
so as to constantly improve the governance mechanism and raise the level of compliance
management.
25 262025 Sustainability Report
02
Environmental Protection:
Practicing Green Operation
to Build a Strong Ecological
Barrier
Adhering to the concept of green development the Company
has carried out solid work in addressing climate change
strengthening environmental compliance controlling
pollutant emissions promoting waste resource utilization and
improving energy efficiency by building a strict management
system setting clear quantitative goals and implementing
effective technical and management measures. It actively
responds to environmental risks seizes green opportunities
realizes the coordinated development of economic and
environmental benefits and builds a strong ecological barrier
for the sustainable development of the enterprise.Addressing Climate Change * (Topic of Double Materiality)
Environmental Compliance Management
Pollutant Emissions
Waste Disposal * (Topic of Double Materiality)
Energy Utilization
Water Resource Utilization
Ecosystem and Biodiversity Conservation * (Topic of Double
Materiality)
27 282025 Sustainability Report
Addressing Climate Change * Risk Impact
Type Risk Description Possibility Potential Financial Impact Cycle1
The Company attaches importance to the possible impact of climate change on the enterprise. It has formulated a Stricter compliance and regulation: National To meet new standards continuous
carbon peaking implementation plan and identified climate change risks and related opportunities. By establishing policies on safety environmental protection and upgrades of environmental
a procedural risk management system the Company has implemented a series of response measures and disclosed energy consumption control for high-energy- protection facilities and
greenhouse gas emission data and emission reduction results. consuming and resource-intensive industries technological transformations are
continue to tighten. Regulatory requirements required and carbon emission costs
such as emission standards and carbon market High will be directly incorporated into
Medium-term
operating costs. long-termGovernance rules (e.g. national carbon market CCER) are
increasingly stringent exposing the Company to Violations may result in fines
risks of rising operational compliance costs and production suspension for rectification and reduced operating
Yunnan Tin actively responds to the national "dual carbon" goals integrates climate change response into corporate penalties for violations.governance and incorporates relevant management into daily production and operation. To promote the green Transition
revenue.and low-carbon transformation the Company has formulated the Carbon Peaking Implementation Plan focusing Risks
on carbon reduction through structural adjustment carbon reduction through strengthened management carbon Supply of upstream raw materials may become
reduction through technological energy conservation and carbon reduction through digital empowerment to tight and costs may rise due to climate policies Medium Increased operating costs.Medium-term
improve the synergistic efficiency of pollution and carbon reduction across the entire industrial chain build a green or physical impacts.long-term
and low-carbon development pattern and ensure the achievement of the carbon peaking goal by 2030.To achieve low-carbon transition goals the
Strategy Company needs to invest in energy conserva-
tion emission reduction solid waste disposal Medium Increased operating costs. Medium-term
and clean energy technologies.The Company has identified the potential financial impacts on the Company from risks and opportunities related to
the transition to a low-carbon economy and climate change itself.Climate Change-related Risk List of Yunnan Tin Climate Change-related Opportunity List of Yunnan Tin
Risk Impact Opportunity Potential Financial Impact
Type Risk Description Possibility Potential Financial Impact Cycle1 Type Opportunity Description Possibility Impact Cycle2
Extreme weather events (e.g. heavy rain snow Through process optimization energy-saving
disasters):
Resource technological transformations (e.g. permanent Intense summer precipitation may lead to a
Efficiency magnet motors waste heat power generation) It lowers operating sharp increase in the water inflow of mines and increased investment in clean energy such as High costs and increases Short-term
disrupting normal production operations and Equipment damage and emergency and Energy
Transition photovoltaic power the Company directly reduces operating revenue.medium-term
Acute threatening facility safety. Heavy snowfall and repairs lead to increased operating energy consumption per unit product and electricity
Physical freezing in winter will affect the transportation Medium costs; Short-term costs.Risks efficiency of mining areas and may cause Supply chain delays result in medium-term
wellheads to freeze seriously affecting the reduced operating revenue.operation of key equipment such as hoists and Outstanding ESG performance can enhance corporate
threatening production safety and employee Reputation
health. and Financ-ing
reputation facilitate access to low-cost funds such as
Oppor-tunities green credit and green bonds and attract long-term
High Lower financing cost. Medi-um-term
value investors.For example sea level rise: Although the
Company's main operations are located
inland sea level rise may affect suppliers It increases supply chain
Chronic logistics nodes or customers located in management costs leads to By assessing physical risks upgrading infrastructure
Physical coastal areas indirectly causing supply chain Low impairment of fixed assets and Long-term Adaptability (e.g. flood control power supply reliability It reduces operating
Risks disruptions rising transportation costs or raises operating costs to ensure and Business improvements) and optimizing supply chain layout High costs and ensures Long-term
changes in market demand thus impacting business continuity. Continuity the Company enhances the overall operational operational stability.the operational stability and the business adaptability to climate change.continuity.
2：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years
29 302025 Sustainability Report
Impact Risk and Opportunity Management To manage the aforementioned risks and seize opportunities the Company has formulated and implemented a
series of response measures with core actions as follows:
Climate Change-related Risk and Opportunity Countermeasures of Yunnan Tin
The Company has established a procedural system for identifying and managing climate-related risks and
opportunities aiming to comprehensively identify potential climate impacts scientifically assess their financial
materiality and formulate effective response strategies.Response Directions Specific Measures
Actively respond to the national "Dual Carbon" goals conduct a full-industry-chain
Governance and Strategic Integration greenhouse gas emission inventory and proactively integrate into energy and carbon
Climate Change-related Risk and Opportunity Management Process of Yunnan Tin emission "Dual Control" management.Regularly conduct climate risk assessments and monitoring and improve emergency
Risk Identification and Management response plans for physical risks. Establish a professional team to track developments
01 Preliminary Identification in domestic and international climate-related laws regulations and policies.
Operational Carbon Reduction and Upgrade and transform equipment promote energy structure optimization and
Energy Efficiency Improvement strengthen comprehensive resource utilization.The Company collects and analyzes climate-related historical data industry reports policy documents
etc. gains an in-depth understanding of climate-related internal activities and business relationships and Seek cooperation with scientific research institutions and industrial chain partners in
examines the external objective environment including climate-related policies laws and regulatory rules Supply Chain and Partners green technologies such as collaborating with partners to advance the electrification of
in the business locations as well as peer analysis and industry benchmarks to identify climate risks and rigid mining trucks to the "100-ton class".opportunities that may potentially impact business operations. Information Disclosure and Market Continuously compile and release annual sustainability reports transparently disclose climate change management performance and communicate climate strategies and
Based on the above analysis the Company organizes the identified risks and opportunities into the risk list Communication progress with investors and stakeholders.and the opportunity list clarifying the specific manifestations likelihood of occurrence and potential scope
of impact for each risk.Metrics and Targets
02 Scientific Assessment In 2025 all production units of the Company conducted greenhouse gas emission accounting in accordance with
the Guidelines for Accounting and Reporting of Greenhouse Gas Emissions from Mining Enterprises (Trial) and
Guidelines for Accounting and Reporting of Greenhouse Gas Emissions from Other Non-ferrous Metal Smelting and
Assess the financial materiality of climate risks and opportunities to the Company's business model Rolling Processing Industries (Trial) providing data support for achieving the carbon peaking goal by 2030.and financial conditions (e.g. revenue expenditure assets liabilities and cash flow) and analyze their
potential financial impacts in the short medium and long term.The Company prioritizes identified climate risks based on their likelihood and potential impact.Greenhouse Gas Emissions of Yunnan Tin (2024–2025)
Indicators Type 2024 2025
03 Formulate Countermeasures Scope 1 GHG Emissions (tCO2e) 293910 301152
In light of its own operational characteristics the Company formulates specific and effective countermeasures Scope 2 GHG Emissions (tCO e) 1257098 944995
based on the identification and assessment results. 2
Scope 3 GHG Emissions (tCO2e) - 112602
04 Constant Monitoring GHG Emissions (Scope 1 Scope 2 and Scope 3) (tCO2e) 1496960 1358749
GHG Emissions Reduced due to Emission Reduction Measures (tCO2e) 54048 61796
The Company regularly monitors the changing trends of climate risks and opportunities to take timely
actions. Meanwhile it regularly reviews risk management activities evaluates the effectiveness of
implemented strategies and timely adjusts and optimizes risk management measures in response to
changes in internal and external environments. 3：They primarily include greenhouse gas emissions from explosives used in mines anthracite coal coke carbon-based solids
graphite paste graphite electrodes limestone soda ash etc. used in smelting.
31 322025 Sustainability Report
Environmental Compliance Management Regulatory Identification and Compliant Operation
The Company strictly identifies and implements national and local laws regulations departmental rules and relevant
The Company has established a grid-based environmental management structure and implemented system standards on ecological environmental protection and carries out environmental protection work in accordance
certification and installation projects through institutional development. We strictly implement the Environmental with the law. In 2025 all new reconstructed and expanded projects strictly implemented the Environmental Impact
Impact Assessment (EIA) and the "Three Simultaneities" system establish a dual prevention mechanism for Assessment and the "Three Simultaneities" system for environmental protection facilities.environmental risks and achieve closed-loop management. At the same time the Company attaches great
importance to raising all employees' awareness of environmental protection and emergency response capabilities Projects Completing EIA Filing Projects Obtaining EIA Approval
through emergency drills training and publicity and builds a solid defense line against environmental risks.Installation Project of Sealed Expansion Project of Tongjie Dagou Tailings Pond of
Radioactive Sources of Wenshan Zinc Hualian Zinc Indium
Environmental Management System and Regulations Indium W et Treatment System Project for High-Impurity Tin-Bearing Dust of Tin Branch
Research and Industrial Application Project of Electric
Furnace Smelting Technology for Tin Polymetallic Materials
The Company has established a grid-based environmental management system led by the Safety Production and
Ecological Environment Protection Committee with the Safety and Environmental Protection Department as the Resource Comprehensive Utilization Project of Tailings
comprehensive supervision department and various professional management departments and production Pond at the Shady Thrust of the Huangmao Mountain at
units coordinating the implementation. The Safety Production and Ecological Environment Protection Committee the Laochang Branch
is chaired by the Secretary of the Party Committee and the General Manager. Its office is located in the Safety
and Environmental Protection Department responsible for daily comprehensive coordination supervision and
inspection.Environmental Management Organizational Structure
Achievement of
Environmental
Management Goals
for Construction
Safety Production and Safety and Environmental Safety and Environmental Projects in 2025
Ecological Environment Protection Department of Protection Departments of
Protection Committee the Headquarters Various Units
Various Professional Management Departments (Centers)
Projects Completing Post-Assessment EIA Projects Passing Environmental Protection
In 2025 the Company continued to deepen the construction of environmental management systems. There are Acceptance upon Completion
six currently effective corporate-level ecological environmental protection systems including the Measures for the
Management of Ecological Environmental Protection and the List of Responsibilities for Ecological Environmental 125000-ton Copper Smelting Upgrading and Technological Transformation Project for Quality
Protection . All production units formulated a total of 66 ecological environmental management systems among Transformation Project of Copper Branch and Efficiency Improvement of Xintian Dressing
which 35 were revised and 15 abolished in the year. The Company actively promotes the ISO 14001 environmental Xiangchong Tailings Pond Project of Kafang Workshop of Hualian Zinc Indium
management system certification. During the reporting period all branches of Yunnan Tin and Wenshan Zinc Indium Branch Technological Transformation for Quality and
passed the certification audit and obtained new certificates and Hualian Zinc Indium passed the certification audit. Efficiency Improvement of Daping Workshop
Research Project on Key Technologies for
Comprehensive Utilization of Zinc-Bearing
Secondary Resources of Wenshan Zinc Indium
Environmental Risk Management
The Company has established a dual prevention mechanism for environmental management with pollution
source control as the core and compiled relevant technical guidelines. In 2025 all units identified a total of 2349
environmental pollution sources and 4712 environmental risks including 445 Class I pollution sources and 441
Class I environmental risks and formulated 5968 corresponding risk control measures and 2680 hidden danger
identification checklists. The Company regularly inspects Class I risk sources and all units carry out environmental
hidden danger identification and treatment in accordance with the checklists.
33 342025 Sustainability Report
Dual Prevention Mechanism and Process for Environmental Risks Emergency Management
Identification and Classification of Pollutant Sources In 2025 in accordance with the relevant laws and regulations on emergency response and emergency plan management the Company set special management and assessment requirements for emergency plans for
environmental emergencies in its Measures for the Supervision and Management of Ecological Environmental
Source identification: We fully identify all pollution sources such as waste gas wastewater solid waste Protection clarifying the norms for plan formulation risk assessment material investigation filing management
and radioactive substances. regular evaluation training and drills.Classification methods: The comprehensive scoring evaluation method (for waste gas and wastewater)
and the direct judgment method (for solid waste and radioactive substances) are adopted to classify
pollution sources into Class I Class II and Class III.Emergency Drills to Build a Line of Defense for Environmental Safety
In 2025 all production units formulated plans and carried out emergency plan training and practical
Identification and Hierarchical Control of Environmental Risks drills to improve emergency response capabilities. Throughout the year a total of 66 training sessions on emergency plans and management were organized with the participation of 1466 employees; 73
emergency drills were carried out covering scenarios such as waste gas leakage tailings pond overtopping
Risk identification: Risk situation mainly includes total emissions exceeding limits non-compliant and dam failure involving 1590 participants. Emergency drills can not only effectively test and improve
operation of environmental protection facilities and non- compliant procedures/facility conditions. emergency plans but also strengthen the Company's cross-departmental linkage and rapid response
Systematic identification and scenario analysis are adopted and the "4M1E method" is used to analyze risk mechanism for environmental emergencies providing a solid guarantee for identifying preventing and
factors. responding to environmental risks in operations.Hierarchical control: The multi-factor evaluation method direct judgment method and expert diagnosis
method are adopted to classify environmental risks into four levels: Major (Class I) Relatively Major (Class
II) General (Class III) and Low (Class IV). The control levels (corporate level department/workshop level
process level post level) are determined according to the risk levels. The higher the risk the higher the
control level and corresponding engineering management institutional and emergency control measures
are formulated.Identification and Management of Potential Environmental Safety Hazards
Identification of potential accidents: Corresponding to the risk control measures the failure of control
measures is identified as a hidden danger.Inspection of potential accidents: Based on the levels of pollution sources and environmental risks the Emergency Drill for Environmental Emergencies at Nanjia Emergency Drill for Environmental Emergencies Involving
levels of hidden dangers (Class A B C D) and the corresponding investigation frequencies and persons Tailings Pond of Hualian Zinc Indium Hazardous Waste Leakage of Hualian Zinc Indium
in charge are determined. We compile hidden danger inspection checklists and carry out investigations
through on-site inspections document reviews random sampling and other methods.Administration of potential accidents: For the identified hidden dangers they will be addressed in
accordance with the principle of the "Five In-places" (measures responsibilities funds time limits
emergency plans) and implement the requirements of the "Four Firsts" (identification governance
reporting and review at the first time) to form a closed loop.Operation Evaluation and Continuous Improvement
We regularly evaluate the operation of the mechanism and review and update the pollution source list risk
control list hidden danger insepction list etc. according to the evaluation results changes in production
processes regulatory updates and other circumstances to achieve continuous improvement. Joint Government-Enterprise Emergency Drill for the Joint Government-Enterprise Emergency Drill for Sulfuric Hazardous Accident of Tailings Pond Flood Overtopping at Acid Leakage Accident of Wenshan Zinc Indium in 2025
Laochang Branch
35 362025 Sustainability Report
Training and Publicity
Case Green Mining Guards Mountains and Rivers Documentary of World Environment Day Activities on June 5
The Company attaches great importance to environmental compliance training and awareness raising. In 2025 the
Company thoroughly implemented Xi Jinping Thought on Ecological Civilization practiced the concept that "Lucid On June 5 World Environment Day in 2025 the Company actively planned and carried out themed publicity
waters and lush mountains are invaluable assets" and carried out multi-level environmental protection training activities and jointly organized afforestation in mining areas targeted publicity and brochure distribution
and publicity activities around the policy of "Precise Pollution Control Scientific Pollution Control and Law-based
Pollution Control". with the local ecology and environmental bureau. It also held various activities such as greening
sowing and knowledge Q&A on Theme Party Day to
popularize environmental protection knowledge.A total of more than 340 publicity materials were
Training and Cross-border Exchange Drive the Improvement of Pollution Prevention Capacity distributed in the activities guiding all employees to
participate in the construction of a beautiful China.In 2025 the Company organized and compiled and distributed learning materials such as the Concise These activities not only beautified the production
Reader on Ecological Environmental Protection Knowledge; We invited experts from the Chinese Research and living environment but also widely spread
Academy of Environmental Sciences to conduct special training on the identification of heavy metal the concept of ecological civilization which has
environmental safety hazards hazardous waste management and the solid waste management policies effectively raised all employees' awareness and
of the "15th Five-Year Plan" with the participation of more than 140 people including the Company's sense of responsibility for ecological environmental
senior management person in charge of each unit and environmental protection backbones; We protection and integrated the concept of green
organized technical investigations and exchanges with units such as CSCEC SCIMEE Sci. & Tech. Co. Ltd development into the corporate culture and daily
and YGMG Inc. laying a foundation for improving the pollution prevention capacity. All production units operations.extensively carried out learning on environmental protection laws and regulations pollution prevention Mine Greening Activity on June 5 World
technologies and typical cases through forms such as the study sessions of the Party Committee Central Environment Day
Group and special training. Training and exchange programs have cultivated talent and tempered the core
environmental compliance capabilities thus driving the improvement of pollution prevention capacity.Joint Tree-planting Activity with Ecology Joint Publicity Activity with Ecology and
and Environment Bureau on June 5 World Environment Bureau on June 5 World
Environment Day Environment Day
Investigation and Exchange Between Yunnan Tin and Ecological Environmental Protection Knowledge
CSCEC SCIMEE Sci.& Tech. Co. Ltd Training of Yunnan Tin
Key Performance
In 2025 the Company invested RMB 358.08 million in environmental protection.No major environmental emergencies occurred in any units of the Company and no penalties for
environmental emergencies were imposed on the Company;
All units of the Company carried out a total of 540 training sessions on environmental protection laws and
regulations and typical cases with a cumulative training of 31830 person-times.Standardized Management Training for Sewage Training on Key Points of Ecological Civilization
Treatment Station of Datun Tin Mine Construction Regulations for Tin Branch
37 382025 Sustainability Report
Pollutant Emissions Production Wastewater Discharge of Yunnan Tin in 2025
Yunnan Tin has established a pollutant management organizational structure with the main leaders of the Party Indicator Unit 2023 2024 2025
and government as the primary responsible persons in charge and the Deputy General Manager taking specific
implementation responsibilities. The Safety and Environmental Protection Department of the Headquarters is Total Wastewater Discharges 10000 m3 117 137 118
responsible for the comprehensive supervision monthly tracking and on-site inspection of pollutant discharge and
the Safety and Environmental Protection Department of each production unit is responsible for specific management 3
and entrusting third-party monitoring and other work. Including: Total Industrial Wastewater 10000 m 117 137 118
Production Wastewater Management Including: Total Domestic Wastewater
4 10000 m3 - 0 0
Chemical Oxygen Demand (COD) kg 17775 24351 25749
In the Measures for the Management of Ecological Environmental Protection and the Measures for the Supervision
and Management of Ecological Environmental Inspections the Company has clarified the management and Ammonia Nitrogen (NH3-N) kg 807 219 624
assessment requirements for the prevention and control of production wastewater pollution pollutant discharge
permits and environmental monitoring. In 2025 all three production wastewater discharge units under the Company Total Nitrogen (TN) kg 2383 4141 3082
held pollutant discharge permits and the discharge concentrations all met the permit limit requirements. In
addition the discharge of key heavy metals in the production wastewater of Wenshan Zinc Indium and Hualian Zinc
Indium all met the special emission limit requirements of key areas in Yunnan Province. On this basis the Company Total Phosphorus (TP) kg 52 45 100
strictly formulated an internal control indicator that the discharge concentration shall not exceed 80% of the permit
limit in accordance with the Measures for the Supervision and Management of Ecological Environmental Inspections. Total Arsenic kg 16 6 32
During the reporting period all three production wastewater discharge units met the internal control standard
requirements.Suspended Solids in Wastewater kg 6757 12364 9484
Production Wastewater Discharge Reduction Targets of Yunnan Tin in 2025 Waste Gas Management
Production Wastewater Discharge Reduction Targets Achievement
In the Measures for the Management of Ecological Environmental Protection and the Measures for Supervision and
Realize closed-loop recycling and zero discharge of production The production wastewater of Copper Branch and Tin Branch Management of Inspections the Company formulated assessment clauses for the prevention and control of waste
wastewater in tin smelting and copper smelting is fully recycled for production after treatment achieving zero gas pollution fugitive emissions management and facility operation and maintenance. The discharge of particulates discharge and key heavy metals in the waste gas of Copper Branch Kafang Branch Wenshan Zinc Indium and Hualian Zinc
Reduce zinc smelting production wastewater by 10% year-on- The discharge reduction ratio reached 17.97% exceeding the Indium which are included in the pollutant discharge permit management meets the special emission limit
year target requirements of key areas in Yunnan Province.In 2025 the Company formulated quantifiable waste gas emission reduction targets for three smelting units included
in the pollutant discharge permit management: Tin Branch Copper Branch and Wenshan Zinc Indium:
Discharge Reduction Measures and Effects
Waste Gas Emission Reduction Targets of Yunnan Tin in 2025
Treatment method: All units implement the principle of "diverting clean water from wastewater and
separating rainwater from sewage" and build classified collection and treatment facilities.Specific discharge reduction measures: Wenshan Zinc Indium added a workshop-level rainwater Waste Gas Emission Reduction Targets Achievement
collection tank in high-risk workshops and recycled high-concentration initial rainwater for production
reducing the treatment volume. Hualian Zinc Indium completed the construction of the initial rainwater Reduce Particulate Matter (PM) emmisions by 15% year-on-year Achieved with an emission reduction of 39.62%
collection system for the dressing system and the transformation of the 906 backwater pump station and
used the initial rainwater and the clarified water from the 906 platform for dressing and dust suppression Reduce sulfur dioxide emisions by 10% year-on-year Achieved with an emission reduction of 15.73%
by sprinkling water in the mining area further improving the Company's water resource utilization rate
and simultaneously realizing the closed-loop management of "wastewater reuse - dust reduction and Reduce nitrogen oxide emissions by 5% year-on-year Achieved with an emission reduction of 6.56%
suppression".Quantitative benefits: Through the above measures the total wastewater discharges of Hualian Zinc 4
Indium and Wenshan Zinc Indium in 2025 decreased by 192200 m3 compared with 2024 and the total ：Statistical scope of wastewater discharge: Wenshan Zinc Indium Hualian Zinc Indium and Yunxiang Mining & Metallurgy which
suspended solid discharges decreased by 2880 kg. hold pollutant discharge permits and are permitted to discharge wastewater.
5：All business units have built domestic sewage treatment facilities; the domestic sewage generated is treated by the facilities up
to the standard and then fully reused for greening water in the factory area without any external discharge.
39 402025 Sustainability Report
Emission Reduction Measures and Effects Waste Disposal*
Treatment method: All units are equipped with and stably operate pollution prevention and control
facilities such as waste gas collection dust removal desulfurization and denitration. For fugitive emissions The Company has established a special waste management system and conducted a systematic assessment of the
measures such as gas collection sprinkling water for dust suppression and dust-proof net covering are risks and opportunities related to waste disposal. Adhering to the principles of reduction and resource utilization
adopted. the Company reduces the generation of low-value hazardous waste through technological transformation and
vigorously promotes the comprehensive utilization and backfilling of solid waste. By setting and achieving hazardous
Specific measures: Copper Branch and Wenshan Zinc Indium upgraded and transformed their dust waste reduction targets the Company continuously improves the waste recycling and utilization rate and develops a
removal facilities reducing the particulate matter emission concentration. Copper Branch optimized the circular economy.ozone denitration process reducing nitrogen oxides in the acid-making tail gas.Quantitative benefits: Through facility upgrading and transformation the particulate matter emissions of Governance
Copper Branch in 2025 decreased by 7.06 tons year-on-year and the nitrogen oxide emissions decreased
by 4.66 tons year-on-year. The particulate matter emissions of Wenshan Zinc Indium decreased by 1 ton
year-on-year. The Company has established a sound solid waste disposal structure and institutional system. The main leaders of
the Party and government as the primary persons responsible for the Company's ecological environment are fully
responsible for relevant work and the Deputy General Manager in charge is assigned to take specific responsibilities.The Company's Safety and Environmental Protection Department of the Headquarters is responsible for the
comprehensive supervision of the generation storage utilization disposal and transfer of solid waste in each unit
through monthly report tracking and regular on-site inspections and the results are included in the assessment
of the annual ecological environmental protection responsibility letter. The Safety and Environmental Protection
Department of each production unit is responsible for the specific management of solid waste in its own unit.To strengthen refined management the Company set up a chapter on the prevention and control of solid waste
pollution in the Measures for the Management of Ecological Environmental Protection of Yunnan Tin Co. Ltd. and
specially formulated the Management System for the Prevention and Control of Solid Waste Pollution of Yunnan
Tin Co. Ltd. This system formulates precise management and assessment clauses from the aspects of generation
collection storage utilization and disposal transfer ledger records and standardized management to ensure
compliance control of the entire chain.Strategy
The Company has conducted a comprehensive review of its own business activities including the whole industrial
chain operation of mining dressing and smelting and regularly sorts out the relevant risks and opportunities of
waste treatment to analyze their potential impacts and provide a basis for formulating targeted response strategies.Upgrading of Dust Removal Facilities
List of Risks Related to Waste Disposal of Yunnan Tin
Exhaust Gas Emissions of Yunnan Tin in 20256
Risk Type Risk Description Possibility Potential Financial Impact Impact Cycle7
Indicator Unit 2023 2024 2025
Total Exhaust Gas Emissions 10000 m3 757900 736311 682485
National and local management laws and Non-compliance may lead
regulations on solid waste (especially to administrative penalties
Nitrogen Oxides (NOx) Emissions kg 230061 201954 188716 Compliance and hazardous waste and tailings) continue to production suspension for Short-term
Regulatory Risks become stricter with upgraded emission High rectification additional
standards strengthened law enforcement and environmental protection
long-term
Sulfur Oxides (SOx) Emissions kg 122079 127653 106955 dynamically changing regulatory requirements. investment and increased operating costs.Particulate Matter (PM) Emissions kg 47796 39201 23671
6：Statistical scope of waste gas emission: Tin Branch Copper Branch and Wenshan Zinc & Indium Branch which are licensed for
waste gas pollutant emissions under their pollutant discharge permits. 7：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years.
41 422025 Sustainability Report
Risk Type Risk Description Possibility Potential Financial Impact Impact
Impact Risk and Opportunity Management
Cycle7
The Company has established a process for identifying and assessing impacts risks and opportunities related to
The large base of low-value hazardous waste sustainable development. For the topic of "Waste Disposal" we follow the steps below:
generation such as arsenic-containing waste Hazardous waste disposal is a
Operation and fluctuations in the market capacity and price of major cost item and its price third-party disposal and the storage capacity Medium increase or poor disposal will Medium-term Disposal Risks limit of self-owned landfills jointly lead to directly affect the gross profit long-term Process for Identifying Risks and Opportunities Related to Waste Disposal
the pressure of disposal costs and the risk of margin and cash flow.channel stability.The identification process starts with an in-depth understanding of the Company's business
Delve into the activities and its value chain. We have sorted out the operational characteristics of the global
Background of tin and non-ferrous metal entire industrial chain focusing on analyzing the generation
the Company's nodes types quantities and physical and chemical properties of solid waste in each link of
In the event of a major Activities and mining dressing and smelting. Storage facilities such as tailings ponds and
Environmental hazardous waste residue yards have potential
accident it will lead to Value Chain
physical risks such as leakage and dam failure. Low catastrophic restoration costs and Safety Risks Long-termHistorical slag heaps require continuous compensation operational
ecological restoration and risk control. interruption and asset impairment.Based on the sorting results we identify a list of risks and opportunities related to waste
treatment that are closely combined with the industry and the Company's actual situation.Establish a List Analyze the potential impacts of each risk and opportunity on the Company's business
and Conduct model business operations financial status and operating results in the short term (1 year
List of Opportunities Related to Waste Disposal of Yunnan Tin Assessment and within) medium term (1-3 years) and long term (more than 3 years). The assessment combines internal financial model calculation management interviews and historical data
comparison (such as comparing the output and disposal cost of hazardous waste in different
years).Opportunity
Type Opportunity Description Possibility Potential Financial Impacts
Impact
Cycle8
Through circular economy and Directly create sales revenue After integrating the assessment results the Company deliberates and prioritizes the
Opportunities comprehensive utilization technologies reduce the procurement cost of primary resources identified risks and opportunities through cross-departmental discussions. for Resource efficiently recover valuable metals from Medium-term Integrated
Efficiency waste and convert bulk solid waste into High and waste disposal costs long-term Analysis and The Company has integrated the above process into the existing environmental
Improvement usable building materials resources to realize and improve the overall Dynamic management system and risk management framework. We regularly review and update
"turning waste into wealth". profitability and resource resilience. Monitoring the risk assessment results to respond to changes in the internal and external environment such as the commissioning of new projects the breakthrough of new technologies or the
introduction of new regulations.Excellent waste management performance
Reputation and transparent ESG disclosure can Help attract ESG-preferred
and Market strengthen the Company's green and Medium investments and may obtain Long -term
Opportunities responsible corporate image and conform to better financing conditions.the trend of sustainable development.
8：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years
43 442025 Sustainability Report
The Company implements classified and full-process management of solid waste and continuously promotes
technological innovation to achieve reduction. Resource Utilization Measures
Hazardous Waste Management Datun Tin Mine Laochang Branch and Kafang Branch actively promote comprehensive
resource utilization. Datun Tin Mine adopted synchronous tailings paste backfilling
technology using 250000 m3 of tailings for underground goaf backfilling in 2025
The hazardous waste generated by the Company is mainly treated through three methods: reducing the amount of tailings entering the tailings pond by about 320000 tons.in-house utilization in-house landfill disposal and entrusting qualified external units for Through underground backfilling and tailings pond dam construction the above-
utilization and disposal. For valuable hazardous waste priority is given to comprehensive mentioned mine units utilized a total of 1.8421 million tons of waste rock throughout
utilization through its own facilities. For those that cannot be self-utilized entrust external the year. Datun Tin Mine generated 1.5136 million tons of waste rock in 2025 of which
units for utilization. For low-value hazardous waste it is sent to the Company's hazardous 433300 tons were self-utilized and 1.0803 million tons were entrusted to third parties
waste residue yard for landfill or entrusted to external units for disposal. In 2025 all for utilization realizing 100% resource utilization of waste rock.hazardous waste was disposed of in accordance with laws and regulations.Hazardous Waste Reduction Practice Specialized Management of Tailings Ponds
The Copper Branch implemented the upgrading and transformation of the hydrogen sulfide arsenic removal In 2025 the Company formulated and implemented the Measures for the Prevention and Control of
system adding an auxiliary tower to improve processing capacity and ensure the long-term stable operation Environmental Pollution by Tailings and the Measures for the Safety Management of Tailings Ponds further
of the system. At the same time it optimized the waste acid wastewater treatment process implemented clarifying management responsibilities and full-process safety and environmental protection control
separate treatment of high-arsenic and low-arsenic wastewater and carried out characteristic identification measures. In terms of environmental management dust is controlled by means of sprinkling water for
of the neutralization residue from sewage treatment generated after process optimization successfully dust suppression covering with dust-proof nets and ensuring the humidity of the beach surface. All tailings
converting part of the low-arsenic solid waste into general industrial solid waste and completing the change wastewater is reused or discharged in accordance with the permit after reaching the standard. Leachate
of the pollutant discharge permit. In 2025 the arsenic-containing residue generated by its waste acid collection facilities and groundwater monitoring wells are improved.treatment system was 7488 tons a significant year-on-year decrease of 40.9%. During the reporting period Datun Tin Mine completed the construction of the leachate
collection tank at the east dam of Tuanshan Tailings Pond effectively preventing and
In addition the Copper Branch focused on promoting research on technology for controlling water pollution risks. The tailings pond at the shady thrust of the Huangmao
extracting valuable metals from white flue dust and realized the long-term stable Mountain at the Laochang Branch built the Company's first production demonstration
operation of the entire process through process optimization. In 2025 a total of 10056 line for comprehensive recovery and utilization of tailings resources comprehensively
tons of white flue dust was comprehensively utilized an increase of 6549 tons of self- and efficiently recovering tin and iron elements from tailings and improving the self-
utilization compared with 2024. sufficiency rate of tin metal.The Tin Branch adopted evaporation technology to treat calcium sulfate residue
reducing its water content. In 2025 14210 tons of calcium sulfate residue were
generated a decrease of 671 tons compared with 14881 tons in 2024.Management of Hazardous Chemicals
In accordance with laws and regulations such as the Regulations on the Conrtol over Safety of Dangerous
Non-hazardous Wastes Management Chemicals the Company has established a management system covering the entire process of identification
storage use and disposal regularly updates the list of hazardous chemicals organizes professional and
technical forces to conduct safety risk identification and evaluation and implements
It is mainly disposed of through self-landfill and entrusted to capable third parties for the inspection and maintenance of safety facilities such as ventilation explosion
utilization and disposal. The Company has standardized the construction of waste protection and fire prevention safety facilities. Through special training and entrusting
rock yards tailings ponds and general industrial solid waste landfills. Mining waste third-party institutions to conduct safety status evaluation the Company ensures that
rock is given priority for underground backfilling and the remaining part is stored relevant qualifications and licenses (such as safety production license and hazardous
in a standardized manner or entrusted to third parties for processing into building chemicals registration certificate) remain valid. In 2025 Tin Branch Copper Branch
materials. Part of the dressing tailings is used for underground backfilling and the rest and Wenshan Zinc Indium all completed the renewal or replacement of relevant
is stored in tailings ponds in a standardized manner. The general solid waste generated licenses ensuring the legal compliance of hazardous chemicals management and
from smelting is entrusted to third parties for utilization or landfill. operational safety.
45 462025 Sustainability Report
Metrics and Targets Energy Utilization
Yunnan Tin has set indicators and targets related to waste treatment.The Company attaches great importance to energy management follows the national "dual control" policy on
total energy consumption and intensity and continuously promotes the optimization of energy structure and the
Key Performance improvement of energy use efficiency through system guarantee goal guidance technological innovation and clean energy substitution.During the reporting period the Company and all units did not receive major administrative Energy management system
penalties from the ecological environment and other relevant departments or be held criminally responsible
The Company has established a clear energy management organizational structure with the Deputy General
due to solid waste management issues. Manager in charge and the Science and Technology Investment Department for overall coordination. The energy
management are fully integrated into the Quality Environmental Occupational Health and Safety Energy
Management System to ensure the systematicness and effectiveness of management. In 2025 in accordance with the
requirements of the Measures for the Administration of Energy Conservation the Company organized all production
Waste Reduction Targets of Yunnan Tin in 2025 units to formulate annual energy conservation plans and targets and incorporated them into the performance
appraisal system. To ensure the continuous and effective operation of the system the Company organized an
internal audit in March 2025 and accepted the external supervision audit by the China Quality Certification Center
from April to May to ensure that the management system is always in a controlled state.Waste Reduction Targets Achievement
Energy Conservation Measures and Projects
In 2025 the output of low-value arsenic-containing The output of low-value arsenic-containing hazardous waste
hazardous waste (non-comprehensive utilizable) from decreased by 17.3% year-on-year achieving the reduction
smelting units decreased by 15%. target. The Company actively promotes new energy-saving technologies and implements a series of energy-saving
transformation projects closely combined with its main business achieving remarkable results:
Highlights of Energy-saving Transformation Projects of Yunnan Tin in 2025
Waste Discharges of Yunnan Tin in 2025
Reconstruction Items Specific Measures and Achievements
Indicator Unit 2023 2024 2025 Hualian Zinc Indium carried out the Research on Energy-saving and Carbon-reducing
Energy Efficiency Improvement of Technology of Dressing Equipment completed the transformation of 25 flotation machine
Dressing Equipment asynchronous motors to permanent magnet synchronous motors achieved more than 15%
Total Waste Generation ton 58406200 55705406 47870317 energy saving per motor and saved 1.34 million kWh of electricity annually.Zinc Smelting
Magnesium Wenshan Zinc Indium adopted self-developed new high-efficiency magnesium removal
Including: Total Hazardous Waste ton 216300 206838 205162 Removal technology to solve the common problem in the industry reducing the electrolytic DC power
Technology consumption by 97.5 kWh/t and greatly reducing the consumption of auxiliary materials.Including: Total Non-hazardous Waste ton 58189900 55498569 47665155 Smelting Through digital transformations such as infrared heating transformation exhaust hood
Process Tin Refining iterative upgrading introduction of AGV intelligent forklifts and 5G intelligent warehousing the
Optimization Energy-saving Tin Branch achieved a year-on-year decrease of 5.55% in refining electricity consumption per
Practice unit and 10.67% in natural gas consumption per unit while improving the production safety
Total Recycled/Reused Waste ton 1135600 3008205 3924186 and efficiency.Refined
Management The Copper Branch implemented the MES system quality management module optimized
Waste Recycling Rate % 1.94 5.40 8.20 of Copper the pulverized coal preparation process and reduced the natural gas consumption per unit of
Smelting pulverized coal preparation by 6.28% year-on-year.The waste heat power generation systems of Tin Branch Copper Branch and Wenshan Zinc
Recovery and Utilization of Waste Indium as well as the belt transportation potential energy power generation system and
Heat and Energy hydropower station of Hualian Zinc Indium had a total self-used or grid-connected power generation capacity of 99.3668 million kWh throughout the year effectively reducing the
demand for external power purchase.
47 482025 Sustainability Report
Utilization of Clean and Renewable Energy Energy Consumption of Yunnan Tin in 2025
The Company actively increases the proportion of clean energy use and optimizes the energy structure. In 2025 the Indicator Unit 2025 2024
amount of clean energy (mainly hydropower) purchased by the Company through market-oriented transactions
reached 174129.78 billion kWh accounting for 89.10% of the total power consumption. In addition the total self-
used waste heat residual energy and photovoltaic power generation of the Company was 114.0096 million kWh Comprehensive Energy Consumption tce 394243 399079
accounting for 6.5% of the clean energy consumption. Among them the new photovoltaic power generation in 2025
was 14.6425 million kWh. The Company has piloted the application of solar energy equipment new energy electric
vehicles and charging piles in the factory area. Energy Usage Intensity tce/10000 yuan of revenue 0.09 0.10
Energy Management Objectives Direct Energy Consumption tce 141843 138229
Including: Coal ton 139362 127556
In 2025 the Company set clear control indicators and targets for energy consumption intensity.Including: Gasoline L 230957 258060
Energy Management Objectives of Yunnan Tin
Including: Diesel L 24998032 28921368
Energy Management Objectives Achievement
The comprehensive energy Including: Natural Gas m3 9122530 9063900
consumption for mining and dressing
of mines remain the same as the Achieved.previous year. Indirect Energy Consumption tce 252400 260850
The comprehensive energy consumption of smelting products decreased by 1.9%
The comprehensive energy compared with the annual assessment index exceeding the target. Among them the
consumption of smelting products comprehensive energy consumption of tin smelting and copper smelting decreased by Including: Electric Power MWh 2053700 2122459
continues to decrease by 1% on the 8.5% and 2.5% respectively compared with the indicators. The comprehensive energy
basis of the previous year. consumption of zinc smelting increased by 5.4% year-on-year due to factors such as the adjustment of the implementation boundary of new standards and technological Total Purchased Electricity MWh 1954333 2042185
challenges and the Company has carried out targeted technological research.The energy consumption target per Consumption of Self-generated Renewable
unit of non-ferrous metal products is Achieved; the energy consumption per unit of non-ferrous metal products is 1.068 tce/ton. Electricity MWh 99367 80274
≤ 1.070 tce/ton.Clean Energy Consumption MWh 1741298 1802232
In 2025 the Company identified a series of challenges in energy management practices: First due to fluctuations
in mineral resources raw material markets and product prices the Company's total energy consumption changes Proportion of Clean Energy Consumption in
accordingly bringing difficulties in setting scientific total energy conservation targets; second the production Comprehensive Energy Consumption % 54 57.97
process is complex the types of energy are diverse and the system relevance is strong making it difficult to achieve
accurate metering of energy consumption in each link. The Company will continue to improve the measurement
system and explore a more refined management model centered on energy consumption intensity to address these
challenges.
49 502025 Sustainability Report
Water Resource Utilization Ecosystem and Biodiversity Conservation *
Yunnan Tin actively follows international guidelines such as the Kunming-Montreal Global Biodiversity Framework
Yunnan Tin has deeply integrated water resource management into sustainable operations and systematically the Convention on Biological Diversity issued by the United Nations and the sustainability standards of International
promoted the construction of water-saving enterprises. Guided by the GB/T 7119-2018 Evaluating Guide for Water- Finance Corporation (IFC) and systematically integrates ecosystem and biodiversity protection into the Company's
saving Enterprise the Company has established a series of water resource management systems centered on the operations. Through the implementation of scientific protection strategies and management actions the Company
Measures for the Administration of Water Supply and Drainage and regularly implemented the management on is committed to contributing to the achievement of global biodiversity protection and sustainable utilization goals by
water conservation water source protection and the prevention and control of risks in water consumption. To ensure 2030.the achievement of the goals the Company clearly included "an annual decrease of 1% in water consumption per
unit product" as a key performance indicator into the annual assessment. Governance
In specific practices the Company reduces the amount of fresh water consumption from the source by optimizing
production processes and water-using equipment. At the same time it strengthens the recovery and comprehensive
utilization of non-traditional water resources such as mine water inflow builds an internal circulation system for
production water and continuously improves the efficiency of water resource utilization and the level of recycling. The Safety and Environmental Protection Department and the Mine Management Center of the Company in accordance with their functional divisions cooperate with each other to jointly promote the effective implementation
of various protection measures for ecosystems and biodiversity. At the institutional construction level the Company
Key Performance formulated and implemented the Measures for the Administration of Mining Technologies (For Trial Implementation) systematically standardizing key links such as mine extraction water prevention and drainage management and
backfilling operations and striving to control and reduce disturbances to the ecological environment at all stages
of operations realizing the overall balance between development and protection. At the same time guided by the
During the reporting period the Company's total water consumption was 4973182 tons; the recycled/ Measures for the Administration of Mining Ecological Restoration Implementation (For Trial Implementation) the
Company promotes each mine to formulate and implement a "one mine one policy" comprehensive management
81998010 94.30% plan ensuring that ecological restoration is carried out scientifically and in an orderly manner and realizing the reused water volume was tons with the water recycling and reuse rate reaching . overall coordination between resource development and ecological protection.
In terms of tailings pond management the Company has established a management system centered on the
Measures for the Administration of Tailings Pollution Prevention and Control and the Measures for the Administration
of Tailings Pond Safety strictly following relevant national laws and regulations on environmental protection and
work safety and clarifying management responsibilities and processes for each link.During the reporting period all affiliated production units of the Company were listed as key supervision units for
soil pollution. To effectively fulfill the main responsibility of environmental protection the Company strictly complies
with the requirements of laws and regulations such as the Environmental Protection Law of the People's Republic of
China and the Law of the People's Republic of China on the Prevention and Control of Soil Pollution requiring each
unit to formulate and implement a potential soil and groundwater pollution hazard identification system.Strategy
To systematically assess and manage the potential impacts of operational activities on ecosystems and biodiversity
the Company has systematically carried out risk identification assessment and analysis work forming a risk list.List of Ecosystem and Biodiversity Risks of Yunnan Tin
Risk Type Risk Description Possibility Potential Financial Impact Impact Cycle9
It may lead to a significant increase
Solid waste generated during mining in environmental restoration and Soil and
Groundwater dressing and smelting may be stored
governance expenditures; the
and disposed of irregularly posing Low Company may face regulatory Long-term Pollution Risks risks of soil and groundwater pollution. fines and administrative penalties; it may incur third-party damage
compensation and litigation costs.
9：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years
51 522025 Sustainability Report
Risk Type Risk Description Possibility Potential Financial Impact Impact
Green Mine Development Model
Cycle9
The Company continuously optimizes the green mine development mode. In the early stage of project development
Biodiversity Mining activities may occupy disturb the Company conducts a systematic environmental and biodiversity risk assessment identifies high conservation
Habitat or destroy surface vegetation and It may lead to an increase in the value areas and key species and reduces ecological disturbance by strictly controlling the operation scope.Destruction animal habitats affecting regional Low Company's ecological compensation Long-term During the continuous operation stage of the mine the Company synchronously promotes ecological protection
Risks biodiversity. and restoration expenditures. management and the construction of employees' environmental protection capabilities and effectively transforms protection awareness into the actions of all employees through institutionalized training and full-
process supervision. At the same time the Company promptly implements dynamic restoration of areas that have
completed mining strictly follows the geological environment governance and land reclamation plan and carries
out projects such as vegetation reconstruction and soil improvement in an orderly manner continuously improving
Geological Mining activities change stratum stress It may generate high emergency the vegetation coverage and ecological functions of the mining area and striving to achieve the coordinated
Hazards and hydrogeological conditions which governance and engineering development of resource development and ecological protection throughout the entire life cycle of the mine.and Surface may induce or aggravate geological reinforcement expenditures; cause
Ecological hazards such as surface subsidence Medium production interruption and asset Long-term
Destruction and landslides further damaging the damage leading to direct revenue
Risks stability of the surface ecosystem. loss; relevant fixed assets may face
Green Exploration
impairment.In green exploration practices the Company strictly follows policy standards such as the Specification for Green
Geological Survey and Mineral Exploration and integrates environmental protection requirements into the entire
Impact Risk and Opportunity Management process of exploration operations. To reduce disturbance to the surface environment the Company actively adopts green prospecting technologies such as "drilling instead of pit" and "one base with multiple holes" in the
exploration stage avoiding the use of traditional excavation methods such as trench exploration. At the same time
the Company continues to consolidate the foundation for the safe and green development of mines by strengthening
To systematically manage risks related to ecosystems and biodiversity the Company has established a full-process the standardization of mining technology and the management of backfilling processes. In addition in the process
risk control mechanism covering the links of "identification assessment monitoring and management". of project management the Company pays attention to full-process supervision and daily control promoting the implementation of green exploration and achieving practical results.Ecosystem and Biodiversity Protection Risk Management Process Principles of Green Mining
Systematically sort out the entire mine Environmental
operation process and the ecological Analyze and assess the occurrence Mining Safety Protection High Efficiency Low Consumption
situation of the surrounding area probability and potential financial
and identify key risks such as soil and impact of the identified risks and
groundwater pollution biodiversity determine the management priority of Have good working Take comprehensive Apply efficient mining Possess sustainable
habitat destruction and geological each risk based on the results. conditions to ensure environmental techniques and development
hazard induction in combination with A mining safety protection measures methods to improve capabilities reduce
internal and external compliance tio
n sse Ris to reduce the negative mechanized production loss and dilution rates
requirements. ca ss k impact of mining on the and labor productivity during mining and
Ris
k
nti
fi men environment and reduce mining reasonably control
Ide t costs energy consumption by mining activities
Man R a gg isk Ris
k
ori
n
Set environmental monitoring em ite
indicators and inspection mechanisms nt Mo
n Based on the risk assessment and Treatment of Soil Pollution
monitoring results formulate and
to achieve dynamic monitoring and implement targeted measures clarify
early warning of risk status. responsibility division and resource
guarantee so as to reduce the To comprehensively prevent and control soil and groundwater pollution risks the Company organized all units to
probability and impact of risks. systematically formulate potential hazard identification plans and environmental monitoring plans. All units strictly carry out soil and groundwater monitoring in accordance with relevant requirements and the content of the plans
and sort out the results of relevant work to form potential soil hazard identification and rectification reports which
are submitted to the local ecological environment management department to ensure that relevant work is strictly
compliant.
53 542025 Sustainability Report
Potential Soil Pollution Hazard Identification Process
Determine key sites or key facilities and equipment for hazard identification
Case The Successful Acceptance of the Governance and Reclamation Project Highlights the Company's Conduct on-site inspection of potential soil pollution hazards Ecological Restoration Capabilities
In 2025 the Company organized the implementation of the Mine Geological Environment Protection and
Prepare potential soil pollution Develop plans/suggestions for the remediation Land Reclamation Project in Lutangba Mining Area systematically managing and reclaiming the pithead
hazard inspection report of potential soil pollution hazards industrial site and waste rock yard and the relevant projects have passed the third-party acceptance
entrusted by the competent department.Before the implementation of the project the Company formulated an annual plan and design in accordance
Establish archives for the identification Implement the rectification of potential with the "two-in-one" plan which was reviewed by experts and filed with the Natural Resources Bureau
of potential soil pollution hazards soil pollution hazards and then steadily promoted works such as site leveling soil restoration and vegetation planting to ensure
the continuous and stable governance effect. The project has completed a total reclamation area of 1.3380
hectares including 0.2993 hectares of sown grass seeds effectively restoring the ecological function of the
land. During the acceptance stage the relevant department entrusted a third-party institution to organize
Collaborate with the Company to organize expert technical reviews to ensure the potential experts and relevant units to conduct on-site inspection and hold a review meeting. The participating experts
pollution hazard identification report meets filing requirements and units unanimously agreed that the project passed the acceptance.The successful completion of the project has effectively improved the local ecological environment of the
mining area and provided solid support for the Company to continuously improve its ecosystem risk control
Summarize the experience of potential capacity.soil pollution hazard identification work
File the potential soil pollution hazard identification
report with environmental authorities
Case Practice the Concept of Green Development Through Land Restoration
Mine Ecological Restoration
In 2025 Kafang Branch of Yunnan Tin carried out systematic ecological restoration on the 2025 Dump (Phase
II) and the abandoned adit industrial site in accordance with the planning and design of 2025. It fulfilled the
The Company formulated the Mine Ecological Restoration Plan in 2025 clarifying the restoration task objectives of mine ecological restoration obligation through platform leveling slag cleaning soil covering tree planting
each mine. Through a series of projects such as soil covering vegetation reconstruction greening land leveling and sowing grass seeds and ditch construction with a total restoration area of 5.8 hectares.slope cutting and benching it steadily promotes the ecological restoration of historical slag heaps the closed tailings
ponds and abandoned mines striving to improve the ecological environment quality of the mining area and promote
the restoration of regional ecological functions.To ensure the implementation of restoration projects the Company has established a closed-loop management
system covering planning implementation tracking and feedback regularly conducts inspections on restoration
progress and promptly identifies and coordinates the solution of problems. Through continuous soil restoration
vegetation planting and long-term management and protection the Company systematically promotes the extension
of mine ecological restoration from construction governance to long-term maintenance and effectively improves the
sustainability and stability of ecological restoration results.The Company Carries out Ecological Restoration on Abandoned Sites and Dumps
Tongjie Waste Dump of Hualian Zinc Indium 1920 Waste Dump of Datun Tin Mine
55 562025 Sustainability Report
Geological Disaster Control Case Comprehensive Recovery Project of Tailings Resources to Develop a New Path for Large-scale Utilization of Tailings
The Company continues to optimize the group monitoring and mass prevention system for geological hazard hidden
points in the mining area. Each mine has formulated corresponding management systems and emergency plans and In 2025 the Company took the tailings pond at the shady thrust of the Huangmao Mountain at the Laochang
systematically fulfilled the main responsibility of disaster prevention through measures such as daily inspections Branch as a pilot to build the first production demonstration line for comprehensive recovery and utilization
manual monitoring and blocking of surrounding areas. of tailings resources in Yunnan Tin Industry.During the reporting period the Company actively cooperated with the local competent department of natural The project innovatively adopted the "hydraulic mining + dry mining" process and efficient mining
resources organized Laochang Branch to carry out geological disaster emergency drills before the flood season equipment such as dredgers which significantly reduced mining costs and safety risks and developed a
and fully completed the inspection of 20 mine geological hazard hidden points. In addition to respond to the set of efficient tailings recovery technology covering coarse and fine classification and "flotation-gravity-
possible impact of Typhoon Matmo the Company specially arranged inspections promptly identified and urged the magnetic separation" combined process realizing the comprehensive recovery of tin and iron elements.rectification of relevant problems and continuously improved the comprehensive prevention and control capacity of In June 2025 the processing capacity of the production line has reached the designed scale of 1300 tons
geological hazards in the mining area. per day and the technical indicators are continuously optimized. In the second half of 2025 it achieved an
average monthly output of about 30 tons bringing an additional monthly output value of about RMB 4.5
million and showing prominent economic benefits.Case Treatment Project of Surface Subsidence Hidden Dangers of Ore Bodies to Build a Solid Geological Safety and Ecological Barrier in the Mining Area The successful implementation of the project has further expanded the Company's tin metal resource supply
channels improved resource self-sufficiency capacity and accumulated technical and safety management
experience for the development and utilization of similar tailings ponds.In 2025 the Company organized the implementation of a special engineering treatment for the surface
subsidence area of certain ore bodies in Laochang a geological hazard hidden point. Based on completing
the Technical Design Report on the Renovation Plan for the Surface Subsidence Hidden Point of the certain
Ore bodies the Company systematically carried out slag backfilling slope cutting and benching land
leveling and topsoil restoration in accordance with the design and simultaneously built a monitoring system
and added protective fences. Through land consolidation and ecological restoration measures the project
has effectively prevented and controlled geological disaster risks in the operation area and promoted the Metrics and Targets
restoration of ecological resilience.Objectives Achievement in 2025
Completed ecological restoration of 97
hectares of mines Achieved; a total of 107.80 hectares was completed.Tailings Management
The Company has established a comprehensive monitoring and prevention mechanism covering water quality
dust and solid waste. Regularly conduct water quality monitoring of groundwater in and around the pond area
and effectively suppress dust pollution through measures such as sprinkling water for dust suppression covering
with dust-proof nets and maintaining the humidity of the beach surface. In terms of wastewater management the
Company strictly implements the requirements of recycling. All production wastewater is reused after treatment or
discharged up to the standard eliminating the impact of tailings water discharge on the environment.To ensure the long-term stable operation of tailings ponds the Company has established a sound daily inspection
and flood season identification mechanism. Personnel at all levels conduct risk inspections in accordance with their
responsibilities regularly inspect and maintain flood discharge facilities transmission pipelines backwater systems
etc. and promptly eliminate hidden dangers. The company also promotes the implementation of a "one pond one
policy" governance plan formulates special rectification measures for problems found in the inspection and forms a
closed-loop management.In addition the Company standardizes the filling of records and the filing of data by establishing a "one pond one
file" environmental management ledger and combines information technology to improve management efficiency.Through the implementation of systems process control and continuous improvement the Company has gradually
built a systematic and standardized environmental and safety management model for tailings ponds and is
committed to realizing the environmental risk prevention and control and safe and stable operation of the entire life
cycle of tailings ponds.
57 582025 Sustainability Report
03
Social Contribution:
Collaborative Innovation
and Win-Win Building a
Responsible Future
The company adheres to the responsibility of realizing
the coordinated development of the enterprise and its
stakeholders and deeply integrates social responsibility
into its strategy and operations. We are committed to driving
industrial progress through technological innovation
ensuring customer value with excellent products and reliable
services working with supply chain partners to make
progress together caring for employees' growth and actively
participating in industry co-construction and social welfare
striving to achieve the unity of economic and social benefits
and create a sustainable better future.Innovation-Driven Development * (Topic of Financial
Materiality)
Product and Service Safety and Quality * (Topic of Double
Materiality)
Data Security and Customer Privacy Protection
S upply Chain Management * (Topic of Double Materiality)
Industry Co-construction and Exchange
Employees
Rural Revitalization and Social Contribution
59 602025 Sustainability Report
Innovation-Driven Development* Risk Type Risk Description Possibility Potential Financial 10Impact Impact Cycle
Yunnan Tin continues to deepen the reform of science and technology management and strives to improve the R&D
and Innovation system. At the top-level design level the company has optimized the functional positioning and
overall coordination mechanism at all levels and improved the grass-roots science and technology management The loss of core technical personnel or improper It may lead the Company
functions forming a hierarchical and collaborative management model. On this basis the Company has revised Risk of protection of key technical information may to increase the cost of
the reward and evaluation system strengthened positive incentives and provided an institutional guarantee Talent and weaken the Company's unique technological Medium alternative R&D or talent
Short-term
medium-term &
for innovation activities. At the same time taking projects as the carrier the Company integrates scientific and Intellectual advantages and trigger intellectual property introduction; It may incur long-term
technological resources builds an innovation engine integrating R&D transformation talent and cooperation and Property Loss disputes. legal litigation costs and
integrates standard and patent layout into the whole process of technological R&D and achievement transformation compensation.continuously enhancing independent innovation capacity.Governance
Risk of R&D activities are characterized by large It may have a negative
Uncertain investment long cycle and high uncertainty. If impact on current profits
Return on R&D major R&D projects fail to achieve the expected Medium reduce the efficiency of
Medium-term
As the core responsible department for the company's R&D and innovation work the Science and Technology Investment technical or commercial goals it will cause capital use and affect
long-term
Investment Department is fully responsible for implementing the Company's scientific and technological innovation resource waste and high sunk costs. overall profitability.strategy coordinating the construction and implementation of relevant institutional systems undertaking the
daily management statistics and incentive evaluation of the company's scientific and technological achievements
patents and intellectual property rights coordinating internal and external scientific and technological resources
organizing the introduction of technology demonstration of technological transformation and external scientific and List of Opportunities Related to the Innovation-driven Topic of Yunnan Tin
technological exchanges and providing systematic organizational support for the Company to continuously improve
its innovation capacity.During the reporting period the company revised the Measures for the Administration of Scientific and Technology Opportunity Opportunity Description Possibility Potential Financial Impact 10
Work of Yunnan Tin Co. Ltd. It covers key dimensions such as intellectual property management scientific and Type Impact Cycle
technological plan and project management the use and statistics of scientific and technological funds and
innovation incentives providing a standardized basis for the systematic operation of R&D and innovation work. The continuous expansion of downstream application fields such as new energy vehicles
has brought a steady growth in market demand
for high-quality tin metal; At the same time the
Market trend of green and low-carbon transformation It may help accelerate Short-term
Strategy Expansion in the industry also provides a strategic High the Company's revenue medium-term
Opportunities opportunity for the Company to further develop growth and optimize the
high-value-added downstream markets revenue structure.& long-term
The Company continuously tracks and analyzes industry trends market dynamics and policy orientations and consolidate its leading position in the
closely combines them with the Company's development strategy so as to identify potential risks and graspable industry by relying on its existing technological
opportunities in the field of R&D and innovation and form a dynamically updated list of risks and opportunities advantages.accordingly.It may help the Company
The Company's R&D and innovation projects reduce financing costs
List of Risks Related to the Innovation-driven Topic of Yunnan Tin Policy Support conform to the orientation of national industrial Medium improve cash flow Short-term Opportunities policies which helps the Company obtain and provide additional medium-term
corresponding policy support. financial support for
continuous innovation.Risk Type Risk Description Possibility Potential Financial Impact Impact Cycle
10
Risk of If the Company's technological R&D is disconnected from the trend of intelligent and Impact Risk and Opportunity Management Disconnection
from green transformation of the industry and fails to
It may lead to weak
Medium growth or decline in main Medium-term
Technological effectively convert technological achievements long-term
Development into product competitiveness it may lead to the
business income.To proactively respond to the uncertainties in technological changes and market evolution and systematically grasp
loss of market share of main products. the innovation-driven strategic opportunities the Company has established a risk and opportunity management
process. Through regular information tracking scientific analysis and judgment and dynamic response and
adjustment it integrates innovation-driven development into the Company's operations and improves the
Company's value creation capacity.
10：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years
61 622025 Sustainability Report
Risk and Opportunity Management Process for the Innovation-driven Topic Intellectual Property Management
Identification Assessment
The Company has built an intellectual property management system covering the whole innovation process
Continuously track industry Analyze the occurrence probability and deeply integrating the creation protection management and operation of intellectual property into all links of
technological trends market assess the potential financial impact of technological R&D achievement transformation and production and operation aiming to effectively prevent and
dynamics and policy orientations the identified risks and opportunities control infringement risks and protect independent innovation achievements.and systematically identify potential Identification clarify their impact cycles and form a
technical market and financial risks classified management list. Key Measures for Intellectual Property Protection
in R&D and innovation as well as
development opportunities brought
by policies markets and technological Assessment
progress in combination with the
company's strategic positioning.Novelty Search at Dynamic Tracking Classified Protection Compliance Analysis for
Project Approval and Protection of Results Introduction and Export
Monitoring
Conduct novelty Continuously track Timely apply for Conduct analysis on the
Monitoring Management searches on patents technological dynamics patents for innovation legal status of intellectual and documents at in R&D and promotion achievements or protect property rights and risk
Set key indicators and early warning Formulate and implement targeted risk home and abroad when and timely take them as technical secrets identification before
mechanisms dynamically track Management mitigation measures and opportunity approving projects to protective measures and control public the introduction of
changes in the internal and external undertaking strategies based on avoid infringement and for the service-related behaviors that may lose technical equipment and
environment and the status of risks the assessment and monitoring repeated R&D. intellectual labor novelty. the export of product
and opportunities and regularly conclusions incorporate them into achievements obtained. technology.update the assessment results. performance appraisal and continuously
optimize the closed loop.To effectively respond to the risks and opportunities in the process of R&D and innovation the Company has taken
systematic and comprehensive response measures to steadily promote R&D and innovation work.Review of Cooperative Response to Specification of
Formulation of Annual Scientific and Technological Plan Patents Infringement Disputes Contract Terms
In business activities such Actively use intellectual Clarify intellectual
as joint ventures and property rules to respond property-related clauses
cooperation submit a when facing patent in relevant contracts and
The Company formulates its annual scientific and technological plan following a systematic and hierarchical "China Patent Legal Analysis infringement allegations. perform the review and
decision-making management process. First the Science and Technology Investment Department will issue a project Report" as one of the bases filing procedures.application guideline clarifying the annual R&D direction and project application requirements. Subsequently for project approval signing
all relevant departments and affiliated enterprises prepare project application materials in accordance with the contracts and market sales.guideline and submit them uniformly within the specified time limit after completing the internal decision-making
procedures. The Science and Technology Investment Department conducts a formal review of the application
materials organizes the Technical Committee (Professional Committee) to carry out professional review forms
review opinions and finally completes the review by the Company's relevant review departments.The projects that have passed the review are summarized to form a draft annual scientific and technological plan
which is submitted to the General Manager's Office Meeting the Party Committee the Board of Directors and the R&D and Innovation Incentives
General Meeting of Shareholders for approval in accordance with the procedures. After the plan is approved it is
officially issued by the Science and Technology Investment Department as the basis for the project approval and
implementation of each unit so as to ensure the overall coordination of scientific and technological resources and
strategic goals. The company continuously optimizes the R&D and innovation incentive mechanism incorporating the number of patent applications the number of patents owned and the implementation of the patent system into the
By formulating the annual scientific and technological plan the Company coordinates and scientifically allocates performance appraisal system for scientific and technological activities of each unit. At the same time the Company
relevant resources promotes the orderly development of innovation work and provides strong support for each R&D sets up a patent award giving inventors a one-time cash reward for authorized service inventions so as to stimulate
and innovation project of the company. the innovation vitality of technical personnel and promote achievement transformation.
63 642025 Sustainability Report
R&D and Innovation Achievements Case Key Technology for High-Temperature Aluminum Removal in Hydrometallurgical Zinc Smelting Process
With 143 years of experience in the tin industry the Company has accumulated profound technological heritage and
cultivated an industry-leading talent team in mining dressing smelting and deep processing. Through continuous In 2025 to solve the clean production problems caused by the cyclic enrichment of aluminum in the
independent innovation the Company has developed a number of dressing equipment core technologies and hydrometallurgical zinc smelting system such as increased ion concentration intensified reactor scaling
processes with independent intellectual property rights and the tin dressing recovery rate remains at the global and decreased production stability Wenshan Zinc Indium launched the research project on key technology
leading level. By virtue of its strong research and development capabilities and fruitful innovative achievements for high-temperature aluminum removal in the hydrometallurgical zinc smelting process. The Company
the company has reached the leading level in the industry in five dimensions: production capacity scale technical set up a 16-person technical research team covering the fields of metallurgy and mechanical engineering
equipment energy conservation and environmental protection digitalization level and comprehensive benefits and systematically studied the distribution law and influence mechanism of aluminum in each link of smelting
has comprehensively established its position as a leading enterprise in the tin industry and set a new benchmark for optimized the high-temperature precipitation process parameters and clarified the phase transformation
the development of the industry. law of multiple elements. In response to the high-temperature high-pressure and high-corrosion working
conditions the team selected corrosion-resistant materials developed core equipment such as autoclaves
Advanced Technologies and heat exchangers built a continuous aluminum removal demonstration line and strictly controlled the
quality through the three-level system of "laboratory test-pilot test-industrialization demonstration".The project aims to develop a new aluminum removal technology
Yunnan Tin smelting technology with no impurity introduction high efficiency and environmental
which is efficient energy-saving and A complete set of refining protection. It is expected to break through 2 key core technologies
clean focuses on oxygen-enriched technology focusing on mechanical publish 2 papers apply for 2 patents achieve an aluminum
Melting smelting oxygen-enriched fuming continuous crystallizers vacuum removal rate of more than 70% a zinc content of less than 2% in
Technology flue gas waste heat power generation furnaces and bimetallic electrolysis.Refining
Technology aluminum removal slag and an indium recovery rate increased to and low-concentration SO2 utilization. 83%. After the completion of the demonstration line it is expected
to save more than RMB 2 million in costs annually. This technology
has the potential to be promoted to various metal smelting fields
and is expected to set a new benchmark for impurity removal in
Case Comprehensive Recovery and Utilization of Rare and Precious Metal Elements in Copper the industry.Smelting Laboratory Test on High-Temperature
Aluminum Removal Process in Autoclave
In 2025 Yunnan Tin Copper Industry carried out the R&D and achievement transformation of the separation
and purification process technology for rare and precious materials in copper anode slime focusing on
the characteristics of "tellurium" and "palladium" materials in copper smelting anode slime and aiming at
solving the problems existing in the current industry technology such as low recovery rate long process
many types of reagents and large amount of wastewater. Relying on the provincial key laboratory platform Case Efficient Smelting System for Tin-Containing Materials
of the Tin and Indium Laboratory the project has successfully developed a short-process refining and
purification technology for low-concentration palladium-containing solution. The Company uses short-
process technologies such as "liquid-liquid reaction" to achieve efficient enrichment and purification of The Company has developed an efficient smelting system for tin-containing materials. Screening the dry tin-
palladium and combines it with the ion recognition gold extraction process to form a "4N ion recognition" containing materials it reduces the spilling and leakage loss of fine-grained materials during transportation
continuous purification process for gold and palladium and has applied for 2 national invention patents and and avoids the mechanical inclusion and flying problems caused by fine materials being put into the top-
2 overseas patents. blown furnace through the belt furnace top. This technology also cancels the water adding link before fine-
grained materials enter the furnace thereby reducing smelting energy consumption and flue gas emissions
At the same time the project developed a "full hydrometallurgical process for recovering tellurium and rare and realizing a greener and more energy-saving smelting process.and precious metals from selenium-tellurium slag" achieving co-precipitation of selenium and tellurium in
rare and precious wastewater; Furthermore with the help of the redox characteristics of H and O under After the implementation of the technology the
alkaline conditions the step-by-step separation and purification of selenium and tellurium are completed. results are remarkable. It not only realizes the
This process has successfully broken through three key core technologies and can produce tellurium closed-loop recycling and re-smelting of self-
products with purity higher than 99% creating an annual economic benefit of about RMB 12.5 million for produced flue dust promotes an important
the Company. The application of this achievement provides an important industrial and technological breakthrough in the top-blown furnace process
foundation for ensuring the security of the scattered national metal resources and supporting the and a record high in crude tin output but also
independent controllability of strategic resources. The relevant achievements have successively won honors reduces the coal consumption of tin-containing
such as the "Entrepreneurship Star" in the "Yunnan Innovation and Entrepreneurship Star" and "Create materials by 3.5% saves nearly 2000 tons of coal
Youth" Competition and the Bronze Award in the China Youth Create Youth Competition (Special Topic on annually reduces electricity consumption by
Technological Innovation). 4.09% and creates economic benefits of more
than RMB 30 million every year. The project has
accumulated 1 utility model patent 1 invention
patent authorized by the State Intellectual
Property Office and 2 overseas patents.Patent Certificate of Efficient Smelting System for Tin-
Containing Materials
65 662025 Sustainability Report
Digitalization Construction
Future R&D Investment Targets
The Company thoroughly implements the national strategic deployment of in-depth integration of industrialization
and informatization and continuously promotes the digital transformation and upgrading of the entire business Continue to increase its investment in R&D with the ratio of R&D investment in 2026 increased by 10% year on
process. year compared with the last year.Case Construction of Unmanned Weighing System for Mine Truck Scale in the Whole Process
Product and Service Safety and Quality *
In response to the Company's digital development requirements Laochang Branch has built and applied an
unmanned weighing system for mine truck scale in the whole process. Based on the Internet of Things and
artificial intelligence technology this project has systematically transformed the traditional weighbridge. As an important participant in the industry Yunnan Tin has always regarded the safety control and quality excellence
Through the upgrading of automated hardware the R&D of intelligent software and the integration of an of products and services as the key starting point for fulfilling social responsibility as well as the core support for
integrated data platform it has realized the unmanned and visual management of the whole process of driving the steady development of business and strengthening market competitiveness. Relying on a strict quality
vehicles from entry weighing to data filing. management system to ensure product quality the Company adheres to continuous improvement to promote
After the system is put into operation remarkable results have been achieved: The single weighing time is the improvement of service quality is committed to meeting and exceeding customer expectations and helps the
shortened to less than 1 minute; the labor cost is reduced by more than 70% and the data accuracy rate enterprise achieve long-term sustainable development.reaches 100%. By eliminating the mixed flow of people and vehicles and eliminating manual intervention
the Company's safety management level and operational efficiency have achieved a leapfrog improvement. Governance
The Company actively responds to the policy orientation of national and industrial quality improvement fully
Case Construction of 5G Factory in Tin Branch implements the requirements of a series of policy documents such as the Three-Year Quality Improvement
Action Plan revises a series of normative system documents such as the Quality Management Regulations the
Standardization Management Measures and the Quality Management Assessment Measures further improves
In 2025 Tin Branch carried out the construction of a 5G factory and was successfully selected into the "2025 the quality management system strengthens the effective implementation and efficient operation of the system
5G Factory" list released by the Ministry of Industry and Information Technology. The 5G factory has achieved consolidates the foundation of quality control and fulfills the quality responsibility of listed companies.
full coverage of the 5G private network in the factory area by deploying 36 base stations and built an overall
architecture of "one dedicated operation network one data middle platform one intelligent operation center At the same time taking the construction of intelligent factories and smart enterprises as important starting points
and many intelligent application terminals". 5G technology has been deeply applied to core production links the Company builds an MES quality control module promotes the full-process control and management through
such as mineral material transportation injection smelting automatic slag fishing and tin ingot casting mechanization automation and informatization of the quality inspection link breaks the traditional data barriers of
realizing efficient interconnection of massive equipment and real-time data flow. quality management comprehensively and refinedly improves the Company's quality management level empowers quality control with technology and helps the enterprise achieve sustainable development.Quality Policy
Metrics and Targets
During the reporting period the indicators and targets of the Company's R&D and innovation topics are as follows:
Excellence Integrity People Energy Green
Key Performance Pursuit Adherence and Orientation Conservation and DevelopmentLaw Compliance Low Carbon
During the reporting period the Company's R&D expenditure was RMB 440.5225 million;
The Company organized and implemented 38 Class I scientific and technological plan projects and Strategy
194 Class II scientific and technological projects; it won 5 provincial and ministerial level scientific and
Focusing on product safety and quality the Company comprehensively carries out risk and opportunity identification
technological awards. work to respond to various challenges related to product safety and quality in market changes prevent quality risks and ensure product compliance. At the same time for various identified risk points and potential opportunities the
Company actively formulates targeted response measures and implementation paths to achieve controllable risks
and graspable opportunities effectively build a defense line for product safety and quality and help the enterprise
achieve high-quality and sustainable development.
67 682025 Sustainability Report
List of Product and Service Safety and Quality Opportunities of Yunnan Tin Quality management system
Risk Type Risk Description Possibility Potential Financial Impact Impact Cycle11 The Company strictly implements the ISO 9001 quality management system promotes standardized procedural
and scientific management and implements full-process quality control covering smelting and mining businesses.By establishing a key performance indicator (KPI) system it systematically monitors the incoming inspection of raw
Traditional production processes may Lead to customer complaints materials production processes product testing and service processes. Mine units focus on the links of dressing
Product lead to appearance quality problems returns claims increase after-sales Medium-term production and product inbound and outbound establish a daily supervision mechanism and product ledger
Quality Defect such as metal inclusions and white Medium costs damage brand value and long-term covering sampling measurement moisture main grade and impurities to ensure the qualification rate of delivered
spots in tin ingots. affect long-term revenue. products.Improper Delayed or improper response to Increase after-sales and
Customer customer quality objections may lead to communication costs may lead to
Complaint deterioration of customer relations and Low order loss or price concessions and Short-term
Handling loss of orders. affect sales revenue.List of Product and Service Safety and Quality Opportunities of Yunnan Tin
Opportunity Opportunity Description Possibility Potential Financial Type Impact Impact Cycle
11
Through technological transformations such
Technological as infrared heating submerged casting 5G Quality Management System Certification
Upgrade and intelligent warehousing and MES system High Directly reduce energy Medium-term
Intelligence improve process stability production efficiency consumption costs. long-term
and process control accuracy.Establishment By improving the ISO 9001 system revising
of Quality internal control standards and carrying out
Management activities such as QC groups and skill training Reduce quality accidents
System and we strengthen the overall quality awareness High and quality costs. Long-term
Cultural and continuous improvement ability of all
Construction employees.Impact Risk and Opportunity Management
The Company systematically carries out the identification and assessment of risks and opportunities focuses on the CNAS Certification of Datun Tin Mine Hualian Zinc Indium and Tin Branch
challenges that may pose a threat to product safety and quality in market changes and formulates and implements
targeted response measures accordingly.
11：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years
69 702025 Sustainability Report
In 2025 the Company continued to strengthen quality management through systematic measures. Quality Culture Construction
First establish and implement a regular product quality supervision mechanism. All units conduct full-item testing of
products and regularly send them to third-party institutions for random inspection. By establishing statistical ledgers The Company has built a systematic quality training system and formulated special training plans in combination
covering product quality process quality inspection quality and quality objection rectification the Science and with annual development needs and employee capacity improvement goals. In 2025 the joint-stock company
Technology Investment Department analyzes data monthly and supervises improvement. The Company formulates organized special training on measurement management primary (intermediate) diagnostician of QC groups
an annual product quality sampling (sending) inspection plan every year carries out internal random inspections and construction of quality trustworthy teams. During the "Quality Month" through lectures competitions
and accepts government supervision. case exchanges and other forms it carried out various forms of training on total quality management laws and
regulations process technology lean management and other contents. Each branch and subsidiary simultaneously
formulated and implemented training plans covering process procedures equipment operation safety and
Key Performance environmental protection forming an upper-lower linkage mechanism for improving the quality capacity of all employees and continuously strengthening the enterprise's quality culture and practical capacity.Second conduct quality management assessments covering
affiliated units twice a year. In July and December 2025 the
Company organized semi-annual assessments issued written In 2025 the qualified rate of the
rectification notices to relevant units for the problems found and Company's products leaving the
promoted a total of 74 rectification items throughout the year factory was
forming a management closed loop and continuously improving
the effectiveness of quality control. 100%
Case Synergistic Efficiency of Intelligent Casting and Green Production: Practice on Optimizing the Appearance Quality of Tin Ingots
In response to the industry pain points such as easy generation of metal inclusions and uneven appearance
quality during the tin ingot casting process Tin Branch systematically implemented process optimization and Quality Training Quality Month Activities
intelligent upgrading. Through source control process oxidation control and back-end automatic processing
combined with infrared heating technology transformation and intelligent warehousing system construction
it achieved a product qualification rate of 100% an energy consumption cost reduction of more than 60%
and a warehousing efficiency improvement of more than 80%. The project won a utility model patent and Quality Shapes up Brand: Multiple Products of Yunnan Tin Won Authoritative Quality and Brand
was selected as an excellent national case of digital and green coordinated transformation providing a Case Honors in the Industry
replicable "Yunnan Tin Plan" for the intelligent transformation of the non-ferrous metal industry. During the
reporting period the case was included in the 2025 National Non-Ferrous Metal Industry Quality and Brand
Construction Case Collection. In the 2025 National Non-Ferrous Metal Industry Quality and Brand
Selection the products under Yunnan Tin stood out: The "YT" tin
ingot was rated as an "Excellent Brand Product" and the "Yunnan Tin
Brand" cathode copper and zinc ingot were rated as "High-Quality
Brand Products". The selection was organized by the China Non-
Ferrous Metals Industry Association and after multiple rounds of
Innovation-Driven Resource Circulation and Digital Upgrade Copper Branch Achieves Green and strict review it demonstrated the industry's authoritative recognition Case Efficient Production of the quality and brand of "Yunnan Tin Brand". The Company has always taken quality as the cornerstone of development. Relying
on intelligent manufacturing and full-chain quality closed-loop
management it has achieved a tin ingot qualification rate of 100% a
During the reporting period with the layout of the innovation chain as the core the Copper Branch in-depth leading A-grade cathode copper rate in the industry and a zinc ingot
implemented the technological innovation and efficiency creation action of "treating waste with waste and purity of 99.9968% continuously driving high-quality development
recycling". Through the technical transformation of in-depth treatment of waste acid wastewater it realized with excellent products.the total sulfidation treatment of high-arsenic waste acid laying a foundation for the treatment of complex
raw materials. The continuous research on flue gas dust resource utilization has continuously released
production capacity. In 2025 a total of 10056 tons of flue gas dust was treated and arsenic sulfide slag was
co-digested. A breakthrough was made in the full hydrometallurgical treatment technology of selenium-
tellurium slag with the tellurium recovery rate greatly increased from 38% to 70% and a new path for
precious metal recovery was derived. At the same time the copper smelting industrial Internet platform is
steadily advancing and the production equipment energy and quality modules are put online for testing Products Won National Non-Ferrous
providing core support for the digital transformation and information integration of the sector. Metal Industry Quality and Brand Awards
71 722025 Sustainability Report
Grassroots Innovation Drives Quality Management Improvement with Multiple QC Groups and For different levels of customer complaints sales units production units and the Market Operation Center cooperate Case Teams Winning Provincial Honors and link up clarify responsibilities and coordinate handling. After receiving a complaint the sales unit quickly feeds back to the production unit which immediately organizes self-inspection and analysis and takes the initiative to
communicate through various channels such as letters calls and online meetings to promote the effective solution of
In July 2025 at the 47th Yunnan Provincial Quality Management Group Congress the quality improvement the problem.practices of many units under the Company were recognized. Four QC groups from units such as Datun Tin
Mine Hualian Zinc Indium Tin Branch and Copper Branch won the first-class achievement award of "Yunnan
Quality Complaint Management System
Provincial Excellent Quality Management Group"
and 2 groups won the second-class achievement
award; At the same time 4 front-line production
teams were rated as "Yunnan Provincial Quality Classified Handling of Complaints Quick Response Communication and Handling
Trustworthy Teams" by virtue of their excellent
process management and quality performance.These honors reflect the Company's long-term
culture of rooting in the grassroots and encouraging
all employees to participate in quality improvement. Customer complaints are classified into general Once a customer complaint occurs the sales unit
Through the continuous development of QC group complaints important complaints and major promptly feeds the customer's claim back to the
activities and team construction the employees' complaints and targeted handling strategies have production unit.sense of innovation and production quality have been developed accordingly. Multiple QC Achievements of Affiliated Units Win Provincial The production unit immediately organizes been effectively improved. Honorary Awards Sales units production units and the Market relevant personnel for self-inspection checks
Operation Center are responsible for handling and analysis and comprehensively identifies the
complaints against their respective units root cause of the problem.The Company implements full-process control over multiple elements such as personnel equipment raw materials or organizations according to the relevant
systems and on-site management clarifies the technology and quality indicators of key processes and realizes full- regulations. Upon receiving a complaint they Through reply letters phone calls remote online
process testing and supervision from raw materials to products. Relying on the "Plan–Act–Check-Improve" cycle it promptly contact the relevant responsible meetings and other methods the Company
systematically identifies and controls quality risks continuously optimizes management processes and operation person to cooperate and handle the complaint maintains close communication with the
mechanisms ensures that products and services continuously meet customer needs and provides a solid guarantee ensuring clear responsibility and efficiency in the customer provides explanations and promptly
for high-quality development. complaint handling process. updates the customer on the progress and results of the handling improving customer satisfaction.Product Lifecycle Management System
Customer Complaint Handling Process
Accept complaints Provide feedback Receive on specific Give feedback on Provide feedback
customer fill out work orders situations and specific situations to relevant units
complaint and record customer and coordinate or departments
information feedback issues and
coordinate
requirements internally within
cross-unit handling based on complaint
Raw Material and Production Process Quality Inspection and Ex-factory and After- the unit content
Auxiliary Material Management Non-conforming Product sales Management
Management Handling
Formulate the Measures Identify key processes The Quality Supervision Factory inspection is Accept complaints
for the Administration of compile the Work Department is responsible stricter than national Analyze causes Analyze and record customer
Raw Material Acceptance Instructions and the for sampling and testing standards and customer Follow up with customers Documentation and offer process issues feedbacks and
and the List of Key Operating Procedures in the whole process feedback is continuously solutions requirements
Materials and Execution and establish a multi- strictly implementing tracked after delivery
Standards to control level inspection system to the Measures for the and opinions are
quality from the source. ensure stable production Administration of Non- collected to promote
quality. Conforming Products and continuous quality
preventing unintended use. improvement. Key Performance
In 2025 the customer satisfaction rate
In accordance with the relevant procedures of the quality management system the Company systematically
carries out quality control and after-sales service work. By establishing a ledger for handling customer opinions of smelting units was98.11%
and feedback it promptly responds to and closes quality and measurement objections thereby driving continuous
improvement of product quality ensuring the delivery of products that meet standards and improving the level of
after-sales service and customer satisfaction.
73 742025 Sustainability Report
Case Quickly Respond to Customer Feedback to Show Quality Integrity Through Professional Traceability Data Security and Customer Privacy Protection
In April 2025 after receiving feedback from a customer that the product weight did not match the certificate To ensure the security of the entire data life cycle the Company
Tin Branch immediately launched a comprehensive traceability inspection retrieved calibration records has established an organizational structure with clear powers and
production data and random inspection records and confirmed that the internal measurement system responsibilities and hierarchical management. The Company has established Those in
was accurate. After analysis the difference was caused by the differences in accuracy traceability and use a Leading Group for Cybersecurity and Informatization Leading Group charge are
conditions of the measurement equipment of both parties. The branch took the initiative to communicate with the Secretary of the Party Committee and Chairman as the group accountable
and explain the situation and suggested that the customer check the stability of their own equipment which leader responsible for overall decision-making and coordination of major
was finally recognized by the customer. This case reflects the Company's close attention to product quality issues. The Leading Group has an office (the "Cybersecurity Office") which
and measurement integrity as well as its proactive response and professional and responsible customer is permanently located in the Informatization Management Department
communication mechanism. responsible for formulating and implementing data security-related systems
technical standards and emergency plans and organizing the promotion Those who
of data classification and grading management security protection and build are
emergency disposal work. accountable
Each unit has established a network and information system security Digital
responsibility system clarified the list of responsibilities strictly Management
Metrics and Targets implemented the national network security level protection system and Principles implemented full-process data control and personnel authority management
to ensure the effective operation of the data security management system. Those who operate are
We have set the following key indicators and targets aiming to promote the continuous improvement of quality Through the combination of system standardization technical protection accountable
management efficiency in a measurable and traceable manner and provide stable and high-quality product and process control the Company implements classified and hierarchical
guarantee for customers. management of data and deploys corresponding protection measures
around links such as collection storage transmission use and destruction
striving to build a safe and reliable data governance environment based Those who
Key Performance on compliant operation and provide a solid guarantee for sustainable use are
development. accountable
During the reporting period the Company had no major quality complaints no major liability accidents related
to product safety and quality no relevant administrative penalties and the number of product recalls was 0. Data Security Management Measures
Data Classification and Legal and Compliant Control of Data Backup and Disaster
Grading Management Collection and Provided to External Recovery Mechanism
2025 Annual Objectives Achievement Approval Parties
Each unit shall manage Clearly define the When providing data Establish a data backup
25 Batches of Products Were Randomly Actually 43 batches were sampled and sent for inspection its data assets by purpose and use to external units it and disaster recovery
Sent to Third-Party Institutions for Quality including 14 batches of supervision and random inspection by classification and of data collection must comply with system perform local
Inspection state-entrusted quality inspection institutions (Achieved) grading in accordance ensuring that it is legal confidentiality and backups and remote
with the Data Security necessary and related de-identification disaster recovery for
Smelting Product Internal Control Law of the People's to the business. Data requirements and important data and
Qualification Rate > 97% 99.92% (Achieved) Republic of China and collection for systems sign confidentiality application systems adopt differentiated with different levels agreements if and regularly conduct
protection strategies of protection must necessary to prevent backup and restoration
and technical measures be approved by the data leakage and drills to ensure business
National Sampling Product Pass Rate = 100% The product factory pass rate was 100%; the national sampling for different levels of corresponding level of abuse. continuity.product pass rate was 100% (Achieved) data. the Cybersecurity and
Informatization Leading
Group.Customer Dispute Resolution Rate = 100% Achieved
75 762025 Sustainability Report
Operation Authority Application of Technical Equipment Domestic Data Storage
and Approval Control Protection Measures Maintenance and and Exit Control Supply Chain Management*
Scrap Management
Implement strict Apply technical Data backup and Important data shall The Company is committed to building a safe transparent and sustainable supply chain which it regards as
approval mechanisms measures such as erasure must be be stored domestically an important cornerstone for achieving responsible operations and long-term value creation. We attach great
for operations data transmission performed before the in principle. If it is importance to supply chain management. By establishing a systematic supplier management due diligence
such as access encryption data equipment is sent necessary to provide review and risk prevention and control mechanism we continuously promote the improvement of supply chain
modification deletion storage encryption for maintenance; it overseas it must performance in terms of compliance environment and social responsibility ensuring that it meets international
and transmission of data leak prevention when equipment is be reported to the norms and stakeholder expectations. Supply chain management not only ensures the efficient and stable operation
important data to and business disconnected to the competent department of the supply chain but also is an important measure for the Company to actively fulfill its social responsibility
ensure that the data confidentiality network or discarded for approval in shape a responsible brand image in-depth implement the ESG governance concept and consolidate the foundation
operation process protection for safe disposal must accordance with for long-term sustainable development.is traceable and important data to be completed and the law to ensure
controlled. ensure data security at storage media must be compliance with
the technical level. removed if necessary to national data exit Governance
prevent data residual security management
risks. requirements.The Company has established a supply chain management organizational structure led and coordinated by the
team of managers. The Market Operation Center and the Operation Management Department as procurement
coordination and management departments are fully responsible for the raw material procurement of the entire
Key Performance company to ensure that the procurement price is reasonable and controllable and the continuity and stability of
production and operation are guaranteed.During the reporting period no data security incidents or customer privacy leakage incidents occurred in The Company continues to improve the supply chain management system formulates and strictly implements internal regulations such as the Measures for the Administration of Procurement Activities the Measures for the
Administration of Suppliers the Measures for the Administration of Procurement Review Experts and the Measures
the Company. for the Administration of Metal Raw Material External Procurement which systematically clarify the division of
responsibilities of each department in supply chain management supplier access and selection principles and
procurement quality control standards providing institutional guarantee for the standardized operation and risk
3 prevention and control of the company's supply chain. The Company offered training sessions on data security and customer privacy protection and carried out
1 related emergency drill.
Strategy
Case Build a Digital Security Line of Defense to Improve Cybersecurity Guarantee Capability
During the 2025 Cybersecurity Awareness Week the Company organized special training and invited experts The Company has identified and sorted out the risks that may affect the safety of the Company's supply
from the Software and Integrated Circuit Promotion Center of the Ministry of Industry and Information chain forming a risk list to provide a reference for formulating targeted response measures.Technology to give on-site lectures. The training focused on core contents such as the requirements of
independent innovation policies digital security construction data center (cloud platform) construction
models and business continuity guarantee and in-depth exchanges were carried out on the construction
of a standardized information Risk Type Risk Description Possibility Potential Financial Impact Impact 12
system operation and maintenance Cycle
system. This activity effectively If upstream suppliers cooperate with May incur high fines; Specific markets improved employees' cybersecurity directly restrict product access due to
a w a r e n e s s a n d p r o f e s s i o n a l Supply Chain non-governmental armed forces and Conflict the Company fails to identify this compliance issues resulting in loss of c a p a b i l i t i e s l a y i n g a s o l i d regional market share; Core customers Short-term
foundation for the Company to Minerals risk it may be identified as indirectly and Non- supporting illegal armed activities due Low terminate long-term cooperation due medium-term promote digital transformation and to the reputational risk of "conflict & long-term
strengthen information security Compliance to supply chain links facing compliance
guarantee. Risks investigations legal penalties and severe
association" and may face joint boycotts
damage to brand reputation. by industry associations resulting in a significant decline in long-term revenue.The Company Launches Cybersecurity Awareness Week
77 782025 Sustainability Report
Risk Type Risk Description Possibility Potential Financial Impact Impact Supplier Access and Selection Cycle12
If upstream suppliers have human May incur high fines; Specific markets In terms of supplier selection the Company has established clear general principles. Suppliers must have legal rights violations such as child labor directly restrict product access due to business qualifications and necessary financial capabilities and at the same time show a good sense of service Risks of employment forced labor wage arrears and be able to actively respond to and collaboratively solve problems in cooperation. In specific selection the
Human and lack of labor safety guarantees and compliance issues resulting in loss of
Rights the Company fails to identify this risk it regional market share; Core customers Short-term
Company follows the standard of "choosing the best for the same price choosing the cheapest for the same quality
Low terminate long-term cooperation due to medium-term and choosing the nearest for the same price and quality" and requires domestic suppliers to strictly abide by the Violations in may face regulatory reviews consumer Company's relevant "blacklist" and supplier management measures.the Supply boycotts and collapse of brand trust the reputational risk of "human rights & long-term
Chain due to supply chain links affecting the association" and may face joint boycotts by industry associations resulting in a For the review and selection of domestic suppliers the Company implements a multi-department collaborative legality and sustainability of business significant decline in long-term revenue. evaluation mechanism. The procurement unit is mainly responsible for reviewing the supplier's qualifications cooperation. operating conditions and credit rating; the procurement entity focuses on reviewing the rationality of payment
May incur high fines; Specific markets terms and the production unit focuses on evaluating whether the quality of the supplied raw materials meets the If upstream suppliers have problems actual production needs.such as imperfect governance structure directly restrict product access due to
Risk of internal control failure bribery and compliance issues resulting in loss of regional market share; Core customers Short-term For foreign suppliers the Company conducts background checks on their qualifications and credit through Supply Chain corruption and false disclosure of supply Low terminate long-term cooperation due medium-term professional institutions such as China Export & Credit Insurance Corporation. On this basis the procurement unit Governance chain information and the Company to the reputational risk of "conflict & long-term reviews their service capabilities; the procurement entity evaluates the rationality of the supplier's payment terms Violations fails to identify this risk it will face risks association" and may face joint boycotts and the production unit conducts key confirmation of the raw material quality thus building a comprehensive and such as regulatory penalties cooperation
defaults and reputation damage. by industry associations resulting in a
prudent international supplier access process.significant decline in long-term revenue.Impact Risk and Opportunity Management Supplier Assessment
To systematically improve the supply chain's anti-risk capability the Company has built a full-process control system To build a robust and sustainable supply chain the Company has established a multi-dimensional supplier
covering risk identification assessment management and monitoring. assessment mechanism. Based on the supplier's contract performance upstream data provision and on-site
inspection it conducts periodic evaluations effectively ensuring the supply quality delivery efficiency and
compliance of procurement activities.Supply Chain Security Risk Management Process
Supplier Evaluation Dimensions
Identification Contract Performance
Collect information related to suppliers mines transportation and countries systematically analyze raw Quantitatively evaluate whether the supplier strictly fulfills the procurement contract from three dimensions:
material market dynamics regulatory policies downstream customer requirements and combine with the quality grade delivery timeliness and contract quantity.Company's procurement situation to accurately identify risks that may damage supply chain security.Analysis and Assessment
Supply Chain Due Diligence Management
Assess the potential impact and occurrence probability of each risk on the Company's operations and
financial status. Conduct systematic due diligence management evaluation on suppliers and use Conflict Affected and High-
Risk Areas (CAHRAs) identification tools to determine the risk level of raw material origin;
Management In accordance with the supplementary content on tin tantalum and tungsten in the OECD Guidelines check
whether there are relevant warning signals in the supply chain;
According to the Company's relevant policies and assessment results take targeted response measures to
systematically manage supply chain-related risks.Monitoring Supply Trends Evaluation
Track relevant risks and management effectiveness through relevant indicators and dynamically adjust
strategies. Based on historical cooperation records comprehensively evaluate the stability of the supplier's supply and long-term cooperation potential.
12：The impact cycle is defined as: Short-term: 1 year and within; medium-term: 1-3 years; long-term: more than 3 years
79 802025 Sustainability Report
Hierarchical Management of Suppliers Responsible Management Process
According to the results of the comprehensive supplier assessment the Company classifies them into four grades: A B
Due Diligence The Company has established a due diligence management organizational structure C and D. For suppliers of different grades the Company implements differentiated management strategies optimizes Management supervised by senior management and collaborated by multiple departments and laid the the Company's supplier structure encourages suppliers to continuously improve relevant performance and ensures foundation for full-process risk management by formulating system systems such as the
the resilience of the supply chain. System Supply Chain Due Diligence Manual.Training of Suppliers The Company systematically conducts warning signal reviews and collects documents such
as KYS;;
Risk
To continuously improve the compliance awareness and coordination level of the supply chain the Company Identification In areas with upstream guarantee mechanisms such as the International Tin Supply Chain
regularly organizes special training for suppliers. The training content focuses on the essence and implementation and Initiative (iTSCi) and the International Conference on the Great Lakes Region Certification
logic of international mining compliance management global mining ESG rules and trends and the Company's Assessment Organization (ICGRL) the Company makes full use of the governance assessment reports
relevant management systems aiming to systematically convey the Company's compliance requirements and monthly on-site work summary reports and accident reports provided by them to carry out
sustainable development concepts help suppliers deeply understand and fulfill their ESG responsibilities and jointly risk information collection risk identification and assessment.build a transparent and responsible supply chain ecosystem.The Company adheres to the principle of "risk prevention first" and formulates the Risk
Management Plan based on the assessment results.Supply Chain Due Diligence Risk Management In response to risks the Company will investigate the facts and report the results of supply
Risk chain risk investigations and the monitoring results of the effectiveness of the due diligence
Prevention management system to the Supply Chain Due Diligence Management Working Group and
The Company formulates and implements system management systems such as the Supply Chain Due Diligence and senior management identify the business segments where risks exist and implement risk
Manual and releases documents such as the Supply Chain Due Diligence Specifications Supplier Code of Conduct Mitigation mitigation measures.and Supply Chain Due Diligence Progress Report on the Company's official website clarifying the requirements for
conflict mineral management. If efforts to mitigate risks fail or the Company deems it impossible to mitigate risks or the risks are unacceptable the cooperative relationship with the supplier shall be suspended
At the same time to systematically promote supply chain due diligence management the Company has established terminated.a due diligence management mechanism led by the chairman supervised by the management and implemented
collaboratively by multiple departments and regularly and irregularly conducts risk assessments on the Company's
tin-containing materials including the origin transportation routes and suppliers of tin-containing materials.Relevant key departments participate in system improvement and process implementation under unified guidance. The Company conducts regular internal assessments to monitor performance and
Internal and participates in external standard assessments such as the China Guidelines and the
External Responsible Minerals Assurance Process (RMAP) - Tin and Tantalum Audit Standards and
Evaluations continuously improves the management system based on the results.Responsible Procurement
Communication
"We recognize that the Company has an obligation to respect human rights and not contribute to conflicts. We and Report The Company regularly compiles and releases the Supply Chain Due Diligence Progress
commit not to engage in any activities that would fund conflicts and to comply with relevant UN sanctions About Risk Management Report disclosing information such as policies structure risk assessment management
resolutions. We will not tolerate nor profit from any serious violations of international law such as war crimes Processes and measures and performance tracking to stakeholders to enhance transparency.crimes against humanity or genocide and inhumane acts. We will not tolerate any direct or indirect support to non- Results
state armed groups through mineral mining transportation trade processing or export. We will not offer promise
engage in or demand any bribes and we resist temptation. We will not bribe to conceal or falsify the origin of
minerals or to falsely report taxes fees and royalties that shall be paid to the government for mineral extraction
trade processing transportation export etc." The Company regards remediation as an independent and key supporting process and is
Remediation committed to providing conditions for or cooperating in the remediation of identified negative
To fulfill the above commitments the Company continues to promote responsible procurement systematically impacts.carries out supply chain due diligence management with reference to international standards such as the OECD Due
Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas Chinese
Due Diligence Guidelines For Mineral Supply Chain 2.0 and China Guidelines and Responsible Minerals Assurance
Process (RMAP) and regularly releases the Supply Chain Due Diligence Progress Report on the Company's official
website every year to maintain transparency.At the same time the Company has formulated and published the Supplier Code of Conduct requiring all suppliers
to adopt consistent policies and actions to jointly identify prevent and mitigate risks of human rights violations and
conflict financing in the mineral supply chain.
81 822025 Sustainability Report
Supplier Integrity Building Case Global Dialogue and Coordination to Build a Resilient and Sustainable Tin Industry Chain
To ensure the fairness transparency and compliance of procurement activities the Company has built a sunshine
procurement management system with the core of "headquarters decision-making unified management and I n N o v e m b e r 2 0 2 5 t h e C o m pa n y a ct i v e l y
graded responsibility". The Company realizes the centralized and visualized operation of the procurement process participated in the Asian Tin Week held in Hong
by integrating the "One Platform" and "One Mall" and systematically prevents and controls procurement risks Kong and conducted multi-dimensional dialogues
relying on the unified supplier management and the underlying logic of "separation of powers". The Company with global industry partners around the theme of
explicitly requires all registered suppliers to sign the Commitment to Compliance and Integrity so as to strengthen "Building a Resilient Global Tin Supply Chain". In
the integrity consensus and behavioral constraints of the supply chain. his opening speech leaders of the group pointed
out that the Company will adhere to long-termism
strive to become the world's best provider of tin
Metrics and Targets and indium products and solutions and promote the development of new productive forces in the
industry. During the conference the Company also
Key Performance discussed sustainable development plans with the International Tin Association conducted business
negotiations with a number of institutions
During the reporting period the Company had no potential suppliers rejected or existing suppliers with continued to expand international cooperation and
terminated cooperation due to non-compliance with environmental and social factors. jointly improved the resilience and responsibility
management level of the critical mineral supply
chain. The Company Participates in the Asian Tin Week Event
Industry Co-construction and Exchange
Exert the Leading Role of the Industry to Jointly Build a New Green and Collaborative Industrial
The Company actively assumes the key role in the industrial chain and promotes the sustainable development of Case Chain Ecology
the non-ferrous metal industry through open cooperation technology sharing and joint standard development.We are committed to maintaining regular dialogue with industry partners professional institutions and industry
associations jointly addressing industry challenges exploring green efficient and inclusive development paths On October 2025 the Company participated as a specially-invited co-organizer in the SMM Tin Industry
building a sound industrial ecology through collaborative innovation and enhancing the overall competitiveness and Chain Conference held in Gejiu. Senior representatives of the Company stated in their speech that they
responsibility level of the industry. are willing to work with industry partners to jointly build a new open collaborative green innovative
resilient and safe tin industry ecology. During the conference the Company conducted in-depth exchanges
Deepen International Exchanges and Cooperation to Jointly Promote the Sustainable Development of with domestic and foreign industrial chain representatives on topics such as sustainable development Case the Global Tin Industry Chain and risk management and won three industry awards including "Tin Smelting Tier 1" and "Digital Trade Collaborative Innovation Award" reflecting the Company's leading role in promoting industrial coordination
and green transformation. Participants also visited the Tin Branch of the Company and further promoted
In June 2025 the Chairman of the Company industry interaction and cooperation through on-site exchanges.was invited to attend the 2025 Indonesia Critical
Minerals Conference & Expo and delivered a
speech emphasizing the important position
of the Southeast Asian region in the global tin
resource supply and industrial development and
stating that the Company is willing to deepen
cooperation with Southeast Asian counterparts in
resource exploration green smelting technological
coordination and market maintenance. The
Company has always adhered to green low-carbon
development and technological innovation and
actively applied digital technologies to improve
the efficiency of the entire industrial chain and
the comprehensive utilization rate of resources.Through this high-level industr y dialogue
the Company has further demonstrated its
responsibility and commitment to promoting the The Chairman of the Company Delivers a Speech at the
healthy stable and sustainable development of the 2025 Indonesia Critical Minerals Conference & Expo
global tin industry.The Company Specially Invited to Co-organize the 2025 15th APAC Tin Industry Chain Conference
83 842025 Sustainability Report
Employees Remuneration Performance
The Company adheres to the "people-oriented principle" and strives to build a salary distribution mechanism with
both internal fairness and external competitiveness. Through the implementation of a diversified salary structure
Excellent human capital is the core driving force for the sustainable development of the enterprise and an important the contributions of employees are accurately matched with their rewards. At the same time the Company has
cornerstone for the creation of social value. Through systematic and humanized management practices we have established an open and transparent performance feedback mechanism and appeal channel to ensure smooth
built a comprehensive management mechanism in the fields of recruitment and selection rights and interests communication channels and fair distribution.protection capacity development and occupational health and safety effectively safeguarding employee well-being
stimulating individual potential and realizing the common growth of employees and the enterprise.Remuneration Structure of Yunnan Tin
Protection of Employees' Rights and Interests
The Company closely combines the standardization of systems with the inclusiveness of practice and has Position Value Company Performance
established a systematic employment management system covering key areas such as anti-discrimination diversity
prohibition of child labor and forced labor. Through regular identification of employment risks the Company Working Competency Department Performance
proactively prevents potential problems such as employment discrimination and insufficient protection of rights and Work Performance Position Salary Performance- Individual Performance interests. related Pay
The Company clearly stipulates in the Human Resources Open Recruitment Management Measures that employers
shall not set discriminatory conditions such as ethnicity race gender and religious belief effectively ensuring the
fairness of recruitment.Performance Appeal Mechanism of Yunnan Tin
Recruitment Principles of HR Department
Introducing
Ensuring Open Adopting both Talent and Seeking Talent
Fair Just and Multi-faceted Intelligence and with Morality and
Merit-based Approaches Prioritizing Equally Competence While
Recruitment and Multiple both Human Giving Priority to Performance Feedback Performance Appeal Performance ReviewMeasures and Intellectual Morality
Resources After the assessment cycle If an employee has different After the acceptance of the
the person in charge of opinions on the annual appeal the Human Resources
the affiliated department performance appraisal results Department will take the lead
(center) conducts one-on-one he or she may first communicate to form a review team with the
Legal and Compliant Employment result communication with with the person in charge of the person in charge of the relevant
employees feeds back specific affiliated department (center). departments (centers) and invite
evaluations jointly analyzes If the communication fails the the leading persons in charge
Restriction Threshold performance and formulates employee has the right to submit of the business as appropriate
targeted improvement plans and a formal appeal to the Human to conduct an objective and
Taking job competency as the sole criterion the Company fully excludes the interference of all irrelevant subsequent development plans. Resources Department in writing prudent verification and
factors such as ethnicity race gender religious belief household registration marital status learning mode or face-to-face. evaluation of the appeal content
overseas study experience and internship duration in the enterprise and is committed to building and and finally feed back the review
maintaining a talent selection environment truly based on ability equal opportunities and diversity and conclusion and handling
inclusion. opinions to the employee in a
formal manner.Age Threshold
The scope of interns is clearly defined as graduates aged 16-24 or unemployed graduates within 2 years of
leaving school and the employment of child labor is strictly prohibited.Identity verification
The Company strictly follows the recruitment compliance system and comprehensively lays a solid
foundation for legal and compliant employment by verifying the original resident identity cards academic
certificates and degree certificates.
85 862025 Sustainability Report
Employee Welfare Key Performance
In terms of welfare protection the Company continues to improve a comprehensive and hierarchical welfare system Total Number of Employees 12699
creates a healthy balanced and sustainable work-life environment for employees and effectively reflects the respect 118 1058
and protection of employees' rights and interests.
270826702243
Welfare Composition of Yunnan Tin Educational
Gender Background Age
Composition of Composition Composition of
Employees of the Employees
Employees
Insurances Benefits 9991 9911 9398
On the basis of paying the full amount of pension In addition to various holidays stipulated by Male Female Master or Above Bachelor Above 50 Years Old
insurance work injury insurance medical law the Company also provides supplementary
insurance maternity insurance unemployment holidays such as maternity care leave family Bachelor or Below 30-50 Years Old
insurance and housing provident fund in planning surgery leave and family visit leave Under 30 Years Old
accordance with the law the Company further actively meeting the reasonable needs of
provides employees with security measures employees in family care health recovery and
such as enterprise annuity and supplementary personal affairs.medical insurance building a systematic health Employee Training and Development
and risk protection network.The Company adheres to the principle of "focusing on internal training and supplemented by external introduction"
and builds a classified and hierarchical training system with precise matching to comprehensively improve the
comprehensive quality and professional capabilities of the employee team. At the same time the Company
continues to promote the integrated development of talent "attraction training and utilization" strives to give play
to the leading and driving role of high-level talent and key backbones establishes a normalized talent inventory
Democratic Management mechanism and two-way exchange mechanism continuously optimizes the talent echelon structure and promotes
the dynamic construction of the team.The Company continues to improve the democratic management mechanism with the Employee Congress as the Training System of Yunnan Tin
core ensuring that employees effectively exercise their democratic rights in all links of the Company's decision-
making supervision and management. At the same time in response to the new requirements of the evolution of
the Company's governance structure and the construction of a modern enterprise system the Company continues Unified Planning and Hierarchical Filing: At the company level the Human Resources Department
to explore multi-level democratic participation channels to promote the in-depth development of democratic formulates the annual training plans for cadres employees and safety in a unified manner which are
management practices. issued after deliberation by the General Manager's Office Meeting or the Party Committee Meeting.All affiliated units shall formulate their own training plans in light of actual conditions under this
framework and file them with the Human Resources Department forming an up-down linked plan
Case The Company Held an Employee Congress to Promote the Cohesion of Employee Consensus management system.Rigid Budget and Approval Control: All training activities shall be strictly included in the annual
The Company held the Annual Work Conference and Employee Congress in February 2025 thoroughly training fund budget. Expenses shall be controlled within the budget; if a temporary increase is really
implementing the spirit of the higher-level authorities comprehensively summarizing the work of the needed the prescribed approval procedures must be fulfilled. Training work shall be carried out in the
past year and systematically deploying the development goals and tasks for the new year. During the province in principle; any training involving leaving the province must be reported to and approved by
conference all representatives actively deliberated on various bills and jointly planned the path of high- the Human Resources Department to practice economy and standardize management.quality development. At the same time all affiliated units of the Company have successively held staff
congresses to uniformly convey and implement the spirit of the relevant conferences. This series of
measures has effectively exerted the role of the Employee Congress as the basic form of democratic
management promoted the unification of the Company's governance and employee participation and
provided an institutional guarantee for gathering consensus and promoting development. Centralized Management and Special Person Responsibility: The Human Resources Department
is the centralized management department of the Company's training work responsible for
overall coordination supervision and guidance. Each training implementation unit (department)
shall designate a special person to be responsible for the specific preparation organization and
implementation of training to ensure the implementation of the plan.Classified Implementation and Precise Empowerment: Training adheres to the principle of "focusing
on internal training supplemented by external training and being practical and effective". In view
of different targets and contents differentiated training objectives class hour requirements and
implementation forms are clarified to ensure the pertinence of training.
8788
Training Plan and Budget Organization Implementation
Management System and Responsibility System2025 Sustainability Report
Promotion of Professional and Technical Personnel
Inclusion in Core Performance Indicators: The "completion rate of employee safety training plans" is
clearly listed as one of the main assessment indicators of the Company's quality environment energy
and occupational health and safety management system strengthening the rigidity and binding force Technical Backbone Research and Training: Focusing on industry trends and professional needs special
of safety training. trainings were carried out covering 1267 business backbones.Implementation of Multi-dimensional Effect Evaluation: A variety of methods such as paper-based New Employee Integration Program: A "Newcomer Training Camp" was held to train 99 emerging talent
assessment experience reports behavior observation learning sharing and practical drills are to help them integrate and grow rapidly.adopted to conduct a comprehensive evaluation of training effects. Emphasis is placed on the
improvement of the ability to solve practical problems after training to ensure that training achieves
"precise empowerment and practical results". Career Development System
The Company has established a dual-channel system for employees' career development and fully implemented
Achievement of Training Task of Yunnan Tin a rank structure with parallel management and professional sequences at the headquarters and affiliated units.The management sequence has 5 clear promotion ladders and the professional sequence has 8 development
levels. There is an intercommunication mechanism between the two sequences. Employees can apply for cross-
Full Staff Safety and Compliance Training sequence conversion after meeting the corresponding standards thus providing a diversified and sustainable career
development path for all types of talent.Mandatory Safety Training: 100% coverage of practitioners; new employees must strictly follow three- In addition the Company has established a multi-dimensional development mechanism centered on competence
level safety education ( ≥ 72 class hours for high-risk positions); transferred or returned employees must and contribution for employees in professional tracks. Employees can accumulate career development points
receive re-training. through diversified channels such as annual performance acquisition of professional qualifications academic
upgrading competition awards and honorary recognition and thereby qualify for salary scale adjustments.Special Compliance Training: "Compliant operation" was included in the full staff plan; by training 54
department compliance administrators and promoting them to carry out internal publicity and lectures
compliance requirements were ensured to reach the front line of business.Key Performance
Forging Skilled Talent
During the reporting period the Company's training expenditure was RMB 13.2293 million; the
Craftsman Elite Training: Relying on the Yunnan Tin Craftsman College classes for "Masters" "Craftsmen"
and "Experts" were set up planning to cultivate 338 person-times high-skilled leading talent.employee training coverage rate was 100%; the total training hours were 657506 hours
General Vocational Skills Training: Skill improvement trainings were carried out for 17 types of work in 34
sessions covering 571 people and the "master-apprentice" inheritance mechanism was implemented.and the average training hours per employee were 51.78 hours.Grassroots Management Empowerment: Special trainings for workshop directors and team leaders were
organized to train 142 people to improve the front-line lean production and team management capabilities.Development of Cadres and Reserve Talent
Rotation Training for Middle-level Managers: All 81 middle-level manager received rotation training to
strengthen their political capabilities and strategic execution.Young Backbone Training: A series of training courses were carried out to train 119 person-times to
accelerate the growth of management reserve forces.Party Affairs Workers' Training: Special trainings were organized covering 1821 person-times to
strengthen the leadership of the Party building.
8990
Assessment Evaluation and
Effect Tracking System2025 Sustainability Report
Employee Care Case Hold New Year's Day Celebration Activities to Create a Strong Festive Atmosphere
The Company continues to pay attention to and actively respond to the multi-level needs of employees and
systematically organizes various cultural care and security service activities. By regularly organizing festival From the end of 2025 to New Year's Day 2026 all
celebrations condolence visits with warmth-giving activities and themed cultural and sports events the Company units and mass organizations of the Company
comprehensively identifies employees' practical needs and development opportunities in terms of spiritual and actively carried out a variety of New Year's
cultural needs living security and team integration and formulates and implements targeted activity plans and celebrations. The activities included making fortune
management measures based on these findings. dumplings garden competitions tug-of-war and
rope skipping brisk walking calligraphy and
riddle guessing and fire prevention and cleaning
Case Series of Celebrations for the "March 8th" Festival to Show the Style of Women covering the headquarters and many grassroots units with extensive employee participation.The activities effectively created a joyful and
peaceful festival atmosphere further enhanced
Around the 115th International Women's Day in team cohesion and a sense of belonging while
March 2025 all units and grassroots trade unions carrying forward traditional culture and promoting
of Yunnan Tin organized a variety of themed employee communication and cooperation and
celebrations. The activities covered flower art injected a positive spiritual driving force for the
salons fun garden parties brisk walking handcraft start of the new year.making knowledge quizzes and a series of fun Yunnan Tin Holds New Year's Day Activities
games providing a rich cultural experience and
communication platform for the majority of female
employees and effectively relieving work pressure.These activities not only created a joyful and
peaceful festival atmosphere but also showed the
positive spiritual outlook of female employees in Case Trade Union's "Sending Coolness in Summer" Activity Benefits Thousands of Frontline Employees
the new era enhancing team cohesion and a sense
of belonging.From June to August 2025 the trade unions of
The Labor Union of Yunnan Tin Undertakes the 2025 Female all units of Yunnan Tin carried out the "Sending
Employees' Aerobics Competition Themed "Showing Coolness in Summer" activity sending heatstroke
Women's Grace and Vitalizing Happy Yunnan Tin" p r e v e n t i o n m a t e r i a l s a n d s i n c e r e c a r e t o
thousands of frontline employees working in high
temperatures continuously deepening the work
brand of "Union Warmth Reaches to Thousands of
Families" holding up an "umbrella of coolness" and
Case Care for Employees in Difficulty and Provide Assistance to Show Warmth igniting the "passion for struggle" with practical
actions and gathering a strong joint force to
overcome difficulties and strive for first-class results.From January to February 2025 the Trade Union
of the Company organized the "Union Warmth
Reaches to Thousands of Families" warmth- The Trade Union Carries Out the "Sending Coolness in
offering activity for the New Year's Day and Spring Summer" Activity
Festival. The activities focus on key groups such
as employees with severe difficulties retired
personnel facing hardships model workers and
village-based team members. Through home Key Performance
visits policy promotion and dynamic support
the Company effectively understands employees'
demands helps resolve practical difficulties
and actively promotes Party policies and trade During the reporting period the Company
union services. This move effectively conveyed
organizational care enhanced employees' sense of
gain happiness and security and at the same time
strengthened the role of the trade union as a bridge assisted 584 staff and workers in
and link creating a warm harmonious united and
progressive enterprise atmosphere.Leaders of Yunnan Tin Visit Employees in Difficulty difficulty.
91 922025 Sustainability Report
Occupational Health and Safety Production Safety Production Management
The Company has established a clear governance structure and continuously improved its occupational health and In 2025 the Company invested a total of RMB 326.7598
safety (OHS) management system and policies; it achieves source prevention through comprehensive occupational million in work safety funds for equipment upgrading and
health surveillance occupational disease hazard prevention and control hierarchical safety risk management technological transformation. For example industrial
and control and hidden hazard inspection and management and has established an internal reporting reward robots are introduced in the smelting link to replace high-
mechanism. It has also formed a professional rescue team; developed comprehensive emergency plans conducted risk manual operations significantly reducing direct
regular drills and fostered a safety culture through multi-level training and themed publicity activities to create a risks. Intelligent means such as full video monitoring of
safe and healthy working environment for employees. high-risk operations and the "grape chart" of team safety
performance are promoted to improve the management
efficiency.Organizational Structure Slag Fishing Robot
The Company has established an organizational structure responsible for occupational health and safety Security Risk Management
management. The Board of Directors is responsible for overall decision-making; the management team takes the
lead in implementation; the Safety and Environmental Protection Department is the centralized management
department; various business departments cooperate in implementation and all subordinate units implement
independent management. A Safety Production and Ecological Environment Protection Committee (Safety Based on the Management Process for Hazard Identification and Evaluation of Risks and Opportunities the Company
Committee) is set up to regularly study major safety and environmental protection issues and deploy key work. continuously updates and improves the dual prevention mechanism for safety and environmental protection. In 2025 a total of 11464 safety risks were identified all of which were subject to hierarchical evaluation and for which
control measures were formulated. 32 four-color safety risk distribution maps were dynamically updated according
to the risk distribution continuously strengthening risk control.Institutional System
In key areas the Company has carried out special identification and rectification actions (such as the 100-day
The Company continues to improve the occupational health and safety campaign for mines) targeting key areas and weak links such as business outsourcing mines smelting housing
management system and supporting systems. In 2025 the Company strictly construction and transportation investigated and dealt with violations implemented rectification and plugged
followed the standard of Occupational Health and Safety Management System management loopholes.- Requirements and Guidelines to ensure the effective operation of the system
and obtained a new system certification in June. In terms of system construction
the Company revised and improved the Detailed Rules for the Assessment of the
Responsibility Letter for Work Safety and Ecological Environmental Protection Full Participation Reward Mechanism
and all subordinate units revised and improved 58 various management
measures such as the work safety responsibility system and abolished 40 in light The Company strictly implements the measures for rewarding internal reporting in the field of work safety
of their own actual conditions. to encourage employees to proactively identify hidden dangers. In 2025 a total of 61 hidden dangers
were received through internal reporting all of which were verified and a total of RMB 11900 in hidden
In terms of management measures through measures such as carrying out danger report rewards were issued and the closed-loop rectification of hidden dangers was completed
occupational health surveillance risk prevention and control education and simultaneously.publicity as well as continuous safety investment and technological innovation
the Company not only guaranteed the physical health of employees but also Occupational Health and Safety
significantly improved the safety of the production process. Management System Certification
of Yunnan Tin
Occupational Health and Safety Production Management Measures of Yunnan Tin
Occupational Health Management
The Company strictly implements national occupational health laws and regulations and has established
a comprehensive occupational health surveillance and risk prevention and control system covering all
employees ensuring that the regular monitoring rate of occupational disease hazard sites reaches 100% and
providing comprehensive health protection for employees exposed to occupational hazard factors. In 2025
the Company organized 9046 employees exposed to dust and poisons to complete pre-job on-the-job and
post-resignation occupational health examinations and tested publicized and declared occupational hazard
factors of all positions realizing closed-loop management. The Company not only strengthens engineering
protection measures such as ventilation and dust removal in daily management but also carries out special
hidden danger identification and treatment activities during the "Occupational Disease Prevention and
Control Law Publicity Week" identifying and rectifying 88 occupational health-related hidden dangers in
total to control health risks from the source.
93 942025 Sustainability Report
Emergency Management
Case Participate in Drills and Competitions to Strengthen Comprehensive Rescue Capabilities
The Company has formulated the Comprehensive Plan for Production Safety Accidents of Yunnan Tin Co. Ltd.which has been filed with the Provincial Emergency Management Department and established a clear emergency In May 2025 the Company's emergency rescue team participated in the Yunnan Province "Yunzhen
organizational structure. The Emergency Rescue Leading Group is composed of the Secretary of the Party Emergency * 2025" major earthquake and catastrophe "five-in-one" joint rescue exercise. In July 2025 it
Committee the Chairman of the Board the General Manager and the Deputy General Manager in charge of safety participated in the Honghe Prefecture "Hongzhen Mission * 2025" earthquake drill. Through participating
with an office under the Safety and Environmental Protection Department (Emergency Management Center). When in high-standard practical government-enterprise joint drills the emergency linkage mechanism was
a production safety accident occurs an emergency command headquarters composed of 9 functional groups further refined and the team's comprehensive rescue capabilities in complex disaster scenarios were
such as emergency rescue and medical rescue is immediately established. All subordinate units have formulated improved. It participated in the Emergency Rescue Worker Competition of the 22nd Yunnan Provincial Staff
corresponding production safety accident emergency plans special plans and on-site disposal plans in light of Vocational Skills Competition and won third place in confined space rescue and the third prize in the group
their own risk characteristics and made emergency disposal cards for employees in high-risk positions forming a competition.hierarchical and comprehensive plan system.The Company has a dedicated permanent rescue force: the Yunnan Tin Emergency Rescue Center which has 7
specialized teams with 78 commanders and rescuers and is equipped with various professional rescue equipment.Each unit is equipped with emergency equipment and supplies such as AEDs portable leak detectors and
emergency shower devices based on the risks of different positions.Key Performance
In 2025 the Yunnan Tin Emergency Rescue Team participated in 3 accident and disaster rescue operations
rescuing 6 trapped people. A total of 298 various emergency drills were organized with 6094 "Hongzhen Mission * 2025" Earthquake Drill Emergency Rescue Worker Competition of Vocational
Skills Competition
participants and observers.Case Government-Enterprise Joint Emergency Rescue Drill to Verify Rescue Capabilities
In June 2025 the Company carried out a
government-enterprise joint emergency
The Company regularly organizes multi-level and multi-scenario rescue drill for a poisoning and suffocation
emergency drills and actively participates in large-scale provincial accident in a non-coal mine in the 1360
and prefectural joint rescue exercises or skill competitions to improve mining area of Datun Tin Mine. The drill
capabilities through competitions. simulated the scenario of 2 operators being
trapped and unconscious underground and
deduced the rescue plan of "mechanical
ventilation + positive pressure respirator
assault" in the whole process achieving
the goals of "verifying the plan refining
the mechanism and popularizing science
and education". Through the practical drill
the scientificity and effectiveness of the
Company's special emergency plan were
verified; the coordination and cooperation
between various internal emergency groups
were strengthened and the practical rescue
capabilities of the rescue team in complex
confined spaces were improved.Government-Enterprise Joint Emergency Rescue Drill in
Datun Tin Mine
Emergency Rescue Drill Site Photos
95 962025 Sustainability Report
Education and Publicity Rural Revitalization and Social Contribution
The Company attaches great importance to the cultivation of a safety culture and the improvement of safety
awareness and creates a strong atmosphere of "everyone talks safety and everyone can handle emergencies"
through diversified and normalized education and publicity activities. A training system covering all employees has Yunnan Tin actively fulfills its responsibility and mission and in the process of keeping pace with the development
been established; in 2025 a total of 1068 publicity and training sessions on various work safety knowledge were of the times and walking side by side with social and people's livelihood it continuously expands the scope of
carried out with 73664 employee participants and the training content covered laws and regulations operating responsibility performance cultivates a strong sense of national pride and family affection and strives to realize the
procedures accident cases and emergency skills. Large-scale themed activities such as "Safety Production Month" organic unity of enterprise value creation and social shared development."Fire Protection Publicity Month" "Traffic Safety Publicity Month" and "Occupational Disease Prevention and
Control Law Publicity Week" were organized. Through various forms such as safety consultation days knowledge
competitions warning education and emergency drills a total of 298 mass safety activities were carried out and Rural Revitalization
thousands of publicity materials were distributed.The Company firmly implements the national rural revitalization strategy actively fulfills the social responsibility of
state-controlled enterprises and strives to build a long-term mechanism to prevent large-scale return to poverty.Case Series of Events for the Occupational Disease Prevention and Control Law Publicity Week Taking the promotion of rural industrial quality improvement living environment improvement and modernization
of governance capacity as the key starting points the Company effectively promotes the steady increase of farmers'
income through various measures and effectively enhances the local people's sense of gain happiness and security.In 2025 focusing on the theme of "Caring for the Mental Health of Workers" the Company carried out
in-depth Occupational Disease Prevention and Control Law Publicity Week activities throughout the
Company. The activities covered all production units such as mines and ground factories and thoroughly
popularized occupational disease prevention and Case Precisely Assist Mazong Village in Lyuchun County to Effectively Promote Rural Revitalization
control knowledge through online and offline linkage
and multi-department coordination. During the activity
period a total of 228 themed lectures were carried out; In 2025 focusing on the actual development of Mazong Village in Lvchun County Yunnan Province the
publicity videos and various publicity materials were Company systematically deployed and solidly promoted the annual rural revitalization assistance work.produced and released covering 10178 person-times. A total of RMB 2.28 million of assistance funds was directly invested throughout the year focusing on the
On April 28 the Company took the initiative to invite implementation of three major measures: industrial empowerment facility improvement and consumption
the Gejiu Municipal Health Commission and the Third assistance. The Company continued to improve the "four-party linkage" mechanism and the closed-loop
People's Hospital of Honghe Prefecture to carry out a management of the "four lists" completed the rotation of village-based team members and carried out a
comprehensive publicity activity integrating themed series of people's livelihood care activities at the same time.lectures first aid skills training and on-site free clinics
by experts in Datun Tin Mine providing employees with This move has significantly improved the industrial development capacity and infrastructure level of
practical health guidance and professional services. Mazong Village directly driven the income increase of farmers and laid a solid foundation for consolidating
and expanding the achievements of poverty alleviation and comprehensively promoting rural revitalization.First Aid Skills Training During the Occupational Disease
Prevention and Control Publicity Week
Case Themed Publicity and Consultation Day Activities for the "Safety Production Month"
In June 2025 during the "Safety Production Month"
event the Company jointly held a "Safety Publicity
and Consultation Day" activity with the Laochang
Town Government and Laochang Branch at the site
of Laochang Branch setting up links such as safety
riddle guessing and a safety expert consultation desk to
provide one-on-one answers to employees' concerned
questions such as mine operation equipment
operation and emergency escape. All units of the
Company carried out a total of 62 such consultation day
activities with 2884 participants and a total of 2377
publicity materials were distributed improving the
work safety awareness of the Company's employees."Safety Publicity Day" Event of Yunnan Tin Rural Revitalization Assistance Projects and Villages
97 982025 Sustainability Report
Case Wenshan Zinc Indium Implements Assistance Practices to Consolidate and Expand the Achievements Social Contribution of Poverty Alleviation
The Company adheres to fulfilling its social responsibilities actively engages in public welfare undertakings and
In 2025 the Company implemented systematic rural continuously expands the breadth and depth of its social contributions. Focusing on key areas such as education
revitalization assistance to Tongsi Community in support health promotion and elderly care and support the Company continuously carries out diversified and
Jiahanjing Town Maguan County Yunnan Province. The normalized public welfare practices conveying corporate warmth and responding to social expectations with
Company provides targeted assistance to local areas by concrete actions.dispatching resident work teams establishing pairing-up
mechanisms and offering job opportunities. Meanwhile
the Company carries out comprehensive work in Party Case Joint Volunteer Action for Elderly Care to Fulfill Corporate Social Responsibility
building policy publicity industrial support (sugarcane
flue-cured tobacco and Brazilian mushrooms)
dynamic monitoring of households lifted out of poverty
and insurance coverage protection. This assistance In March 2025 the Communist Youth League Committees
initiative has effectively promoted local livelihood of the Tin Branch and the Copper Branch organized League
improvement industrial cultivation and organizational members and youth to launch a themed League Day activity
mechanism strengthening providing strong support themed "Practicing the Spirit of Lei Feng and Conveying
for consolidating and expanding poverty alleviation Wenshan Zinc Indium Assists Tongsi Community Warmth for the Elderly" at the Gejiu Social Welfare Center.achievements and promoting all-around community Jiahanqing Town The young people cordially communicated with the elderly
revitalization. listened to their past stories and presented practical items such as laundry detergent and soap conveying warmth
through practical actions. This activity provided both material
and spiritual comfort to the elderly and also enabled young
workers to deepen their understanding of respecting and
assisting the elderly through dedication. The Communist
Youth League Committees of the two branches stated that
Case Hualian Zinc Indium Focuses on Targeted Assistance to Boost All-Around Rural Revitalization they will continue to carry out various voluntary services to
fulfill social responsibilities and contribute youthful efforts to
promoting the trend of respecting the elderly.In 2025 the work team dispatched by the Company to Communist Youth League Committees of Tin and
Dazhai Village Dulong Town Maguan County Yunnan Copper Branches Launch Lei Feng-Themed Elderly
Province systematically carried out assistance work Care Volunteer Service Activities
centering on the "Five Responsibilities". The work team
strengthened Party building guidance and Party member
education and strictly implemented the dynamic
monitoring mechanism against poverty return. It supported Case Children's Care and Assistance Activities to Convey Warmth and Support Growth
the expansion of the red ginseng industry to 1005 mu
provided waste stones to repair industrial roads and
carried out consumption assistance. This work has not only
facilitated all-around rural revitalization through targeted In November 2025 the Communist Youth League Committee
monitoring and industrial support but also improved of the Copper Branch organized young volunteers to launch
rural governance through infrastructure construction legal a voluntary service activity themed "Warmth to Children
publicity and environmental improvement. Care for Growth" at Xinpobei Primary School Datun Town
Hualian Zinc Indium Assists Dazhai Village Gejiu City. Volunteers donated love materials such as clothes stationery books and sports goods to the children
interacted cordially with them and conveyed warmth and
encouragement through painting singing and fun games.Leaders of the branch encouraged students to study diligently
and set up ideals. This action provided material support to
Key Performance children in need and gave them spiritual companionship and
care. The Communist Youth League Committee of the Copper
Branch stated that it will continue to carry out voluntary
services to support the healthy growth of teenagers.During the reporting period the Company's total investment in rural revitalization reached RMB 2.28
million benefiting 11660 people.Copper Branch Launches Voluntary Donation
Service Activities
99 1002025 Sustainability Report
Case Fire Safety Volunteer Service Activities to Fulfill Corporate Social Responsibility for Safety Production Appendix
In November 2025 the Communist Youth League Committee
of Datun Tin Mine organized young volunteers to carry out ESG Performance Data Sheet
fire safety publicity volunteer service activities around the
theme of "Safe Use of Fire and Electricity" for the Fire Safety
Publicity Month. Volunteers went deep into staff dormitories
to identify potential electrical safety hazards and assisted Environmental Category
in rectifying problems such as unauthorized wiring and
illegal use of high-power electrical appliances. At the same
time they also explained precautions for safe electricity use
for different places such as restaurants and convenience Indicator Name Unit 2025 Data 2024 Data
stores. This activity effectively improved the fire safety
awareness and emergency risk avoidance capabilities of Environmental management
staff and merchants demonstrating the responsibility of
League members and youth in serving the enterprise and
safeguarding safety. Total investment in environmental management 10000 RMB 35808 31669
Communist Youth League Committee of Datun Tin
Mine Launches Safety Publicity Activities
Proportion of total environmental management
investment in operating revenue % 0.82 0.75
Number of violations of environmental laws and
regulations pcs 0 0
Key Performance
Amount of major administrative penalties imposed
by relevant departments such as ecological and
1708 environmental authorities due to environmental
10000 RMB 0 0
During the reporting period a total of person-times of employees participated in volunteer incidents during the reporting period
Energy usage
activities with an average duration of 95.47 hours per person.Comprehensive energy consumption tce 394243 399079
Direct energy consumption tce 141843 138229
Including: coal ton 139362 127556
Including: gasoline L 230957 258060
Including: diesel L 24998032 28921368
Including: natural gas m3 9122530 9063900
Indirect energy consumption tce 252400 260850
Including: power MWh 2053700 2122459
Total purchased electricity MWh 1954333 2042185
Consumption of self-generated renewable electricity MWh 99367 80274
Clean energy consumption MWh 1741298 1802232
101 1022025 Sustainability Report
Indicator Name Unit 2025 Data 2024 Data Indicator Name Unit 2025 Data 2024 Data
Proportion of clean energy consumption in % 54 57.97 Water consumption by source: Fresh surface water comprehensive energy consumption (lakes rivers etc.) ton 129765 32108
Water pollutant emission Recycled/reused water ton 81998010 77972096
Total wastewater discharges 10000 m3 118 137 Water recycling and reuse rate % 94.30 94.50
Including: total industrial wastewater 10000 m3 118 137 Waste disposal
Total waste generation ton 47870317 55705406
Including: total domestic wastewater 10000 m3 0 0
Including: total hazardous waste ton 205162 206838
Chemical oxygen demand (COD) kg 25749 24351
Including: Total non-hazardous waste ton 47665155 55498569
Ammonia nitrogen (NH3-N) kg 624 219
Total recycled/reused waste ton 3924186 3008205
Total nitrogen (TN) kg 3082 4141
Waste recycling rate % 8.20 5.40
Total Phosphorus (TP) kg 100 45
GHG emissions
Other specific pollutants for example: Scope 1 GHG emissions tCO2e 301152 293910
Total Arsenic kg 32 6 Scope 2 GHG emissions tCO2e 944995 1257098
Suspended solids in wastewater kg 9484 12364 Scope 3 GHG emissions tCO2e 112602 /
Soil pollutants GHG emissions reduced due to emission reduction
measures tCO2e 61796 54048
Arsenic and its compounds kg 318 243 Total GHG emissions (Scope 1 Scope 2 and Scope 3) tCO2e 1358749 1496960
Cadmium and its compounds kg 4 10 Air pollutant emission
Other specific pollutants kg 54 156 Total exhaust gas emissions 10000 m3 682485 736311
Water resource management Nitrogen oxides (NOx) emissions kg 188716 201954
Total water consumption ton 4973182 4569150 Sulfur oxides (SOx) emissions kg 106955 127653
Water resource usage intensity ton/10000 yuan of
Particulate matter (PM) emissions kg 23671 39201
revenue 1.14 1.42
Ecosystem and biodiversity conservation
Total consumption of fresh water ton 4973182 4569150
Mine ecological restoration area Ha 107.80 /
Water consumption by source: Municipal water supply ton 4843417 4537042
103 1042025 Sustainability Report
Social Category
Indicator Name Unit 2025 Data 2024 Data
Indicator Name Unit 2025 Data 2024 Data Number of employees below bachelor's degree Person 9911 10629
Employment Number of Number of employees with bachelor's degree Person 2670 2525
employees by
Total number of employees Person 12699 13247 education level Number of employees with master's degree Person 116 91
Number of Number of local employees Person 11343 11516 Number of employees with doctoral degree Person 2 2employees
Proportion of local employees % 89.32 86.93 Number of senior management employees Person 8 8
Number of newly hired employees Person 134 163 Number of Number of middle-level management employees Person 79 70
Number of new employees by
employees
Number of newly recruited full-time employees Person 134 158 rank Number of junior management employees Person 423 423
Number of female staff Person 2708 2825 Common employee Person 12189 12746
Number and Number of male staff Person 9991 10422 Number of employees of minority nationalities Person 4661 4771
proportion of Employment
employees by situation
gender Proportion of female employees % 21.32 21.33 of special Number of employees with disabilities Person 130 115
employees
Proportion of male employees % 78.68 78.67 Number of veteran employees Person 589 622
Number of part-time employees Person 1 1 Average revenue
per capita Average revenue per capita 10000 RMB 356.59 316.85
Number and
proportion of Number of full-time employees Person 12698 13246
employees by Number of
employment employees Proportion of part-time employees % 0.01 0.01
type in difficulty
Person-time of employees in difficulty receiving Person-
receiving assistance time
584503
Proportion of full-time employees % 99.99 99.99 assistance
Number of employees under 30 years old Person 1058 1373 Number of employees resigned Person 681 683
Number of employees at 30-50 years old Person 9398 9543 Number and Employee turnover/resignation rate % 5.36 5.16proportion of
employees
Number and Number of employees over 50 years old Person 2243 2331 resigned Number of voluntary employee resignations Person 87 124
proportion of
employees by
age Proportion of employees under 30 years old % 8.33 10.36 Employee voluntary turnover rate % 0.685 0.94
Proportion of employees at 30-50 years old % 74.01 72.04 Employees' rights interests and welfare
Proportion of employees over 50 years old % 17.66 17.60 Basic rights
and interests Coverage rate of employee social insurance
protection payment
%100100
Discrimination Confirmed discrimination incidents pcs 0 0
Forced Labor Confirmed forced labor incidents pcs 0 0
105 1062025 Sustainability Report
Indicator Name Unit 2025 Data 2024 Data Indicator Name Unit 2025 Data 2024 Data
Child labor Confirmed child labor incidents pcs 0 0 Total training hours for male employees Hour 522939 469766
Occupational health and safety Average training duration received by male
employees Hour 52.34 45.07
Safety drills Number of safety drills (fire toxic gas leakage etc.) Time 298 181
Total training hours of senior management Hour 736.75 765
Total production safety investment 10000 RMB 32675.98 26679.75 Employees training and
assessment Average training duration per senior management member Hour 92.09 95.63
Investment amount in employee work injury
insurance 10000 RMB 3260.13 2514.61
Annual training expenditure 10000 RMB 1322.93 1368.57
Production
safety Investment amount in employee work safety liability insurance 10000 RMB 154.21 169.24investment Number of employees undergoing training Person 12699 13247
Coverage rate of employee work injury insurance % 100 100 Coverage rate of employees trainings % 100 100
Coverage rate of employee work safety liability
insurance % 100 100
Supplier management
Overall suppliers Number of suppliers pcs 62 /
Number of work-related injuries (minor injuries and
above) Person 20 17
Supplier assessment coverage rate % 100 /
Supplier
Number of lost workdays due to work injury Day 8065 7156 assessment
Work injury Supplier assessment pass rate % 100 /
Rate of occupational disease % 0 /
Percentage of suppliers signing contracts including
environmental and labor requirements clauses % 100 /
Lost Time Injury Frequency Rate (LTIFR) / 0.585 0.67
Sustainable Proportion of suppliers that have conducted social
Talent training and development procurement impact assessments % 100 /
Total number of hours of training Hour 657506 599281 Percentage of purchasers within the Company who
have received sustainable procurement training % 100 /
Average training duration per capita Hour 51.78 45.24
Employees R&D innovation
training and
assessment Total training hours for female employees Hour 134567 129515
R&D expenditures 10000 RMB 44052.25 39748
Average training duration received by female Hour 49.69 45.85 R&D investment employees Proportion of total R&D expenditure to operating
income % 1.01 0.94
107 1082025 Sustainability Report
Indicator Name Unit 2025 Data 2024 Data Indicator Name Unit 2025 Data 2024 Data
Number of patents held pcs 485 374 Data security and customer privacy
Number of invention patents held pcs 140 110 Number of confirmed data security incidents pcs 0 0
Number of invention patents applied to main
businesses pcs 485 374
Specific amount involved in data security incidents 10000 RMB 0 0
Intellectual Number of training on data security and customer
property rights Number of software copyrights held pcs 34 25 privacy protection Time 3 5
Data security and
Number of new patents in the year pcs 111 54 customer privacy Number of relevant emergency drills Time 1 2
Number of patents under examination pcs 38 51 Number of confirmed customer privacy leakage
incidents pcs 0 0
Number of copyrights held pcs 0 0
Specific amount involved in customer privacy
leakage incidents 10000 RMB 0 0
Product quality
Public welfare
Product percent of pass % 100 100
Person-time of participation in volunteer activities Person-
Product recall quantity pcs 0 0 of employees time 1708 1059
Employee
Production
Product recall ratio % 0 0 volunteering quality Average duration of employee volunteer activities
per person Hour 95.47 216.8
Amount involved in major liability accidents related
to the safety and quality of annual products and 10000 RMB 0 0 Rural revitalization
services
Total investment in rural revitalization 10000 RMB 228 198.04
Customer service Rural
revitalization Number of Beneficiaries of Rural Revitalization
Customer Work Person 11660 5491
satisfaction Customer satisfaction survey results % 97.57 97.19
survey
109 1102025 Sustainability Report
Governance Category
Indicator Name Unit 2025 Data 2024 Data Indicator Name Unit 2025 Data 2024 Data
Corporate governance General Meeting of
Shareholders Number of the General Meeting of Shareholders held Time 4 3
Total number of members of the Board of Directors Person 9 9
Business ethics
Including: number of female members Person 1 1
Commercial bribery
and corruption Total number of corruption incidents pcs 0 /
Including: number of independent directors Person 3 3 incidents
Proportion of female directors on the Board of Directors % 11.11 11.11 Number of anti-commercial bribery and anti-corruption
training sessions held Time 146 /
Proportion of independent directors on the Board of
Directors % 33.33 33.33 Total number of directors covered by anti-commercial
bribery and anti-corruption training Person 6 /
Proportion of independent directors on the Audit
Committee % 66.67 66.67 Anti-commercial
bribery and anti- Percentage of directors covered by anti-commercial bribery and anti-corruption training % 66.67 /corruption training
Proportion of independent directors on the
Performance and Compensation Committee % 66.67 66.67 Total number of management personnel covered by
anti-commercial bribery and anti-corruption training Person 17 /
Proportion of independent directors on the Nomination
Committee % 66.67 66.67 Percentage of management personnel covered by anti-
commercial bribery and anti-corruption training % 82 /
Proportion of independent directors on the Strategy
Investment and Sustainable Development (ESG) % 20 20 Proportion of
Board of Directors Committee personnel signing Proportion of employees who signed the Integrity
the Code of Conduct Commitment % 100 /
Number of full Board meetings Time 7 7 Commitment
Number of meetings of the Audit Committee under the Total number of lawsuits / administrative penalty
Board of Directors Time 6 7 incidents for violating fair competition
pcs 0 /
Cases of unfair
competition
Number of meetings of the Directors Nomination Time 3 2 Total fines for violating fair competition
RMB
Committee (10000)
0/
Number of meetings of the Board Performance and ESG Management
Compensation Committee Time 3 2
ESG Training ESG Training Frequency Time 1 1
Number of meetings of the Strategy Investment and
Sustainable Development (ESG) Committee under the Time 4 4
Board of Directors Economic category
Average attendance rate of the Board Meetings % 100 100
Indicator Name Unit 2025 Data 2024 Data
Number of directors attending less than 75% of
meetings Person 0 0 Operating income RMB (100 million) 435.35 419.73
Proportion of female senior management % 14.3 16.67 Net profit RMB (100 million) 19.66 14.44
111 1122025 Sustainability Report
Index Table
Self-Regulatory Guidelines No. The United
17 for Companies Listed on Nations
Reporting Framework Shenzhen Stock Exchange — GRI Standards Sustainable Self-Regulatory Guidelines No. The United
Sustainability Report (For Trial Development 17 for Companies Listed on Nations
Implementation) 13 14 Goals (SDGs) Reporting Framework Shenzhen Stock Exchange — GRI Standards Sustainable Sustainability Report (For Trial Development
Implementation) 13 14 Goals (SDGs)
1 About This Report GRI 2: General Disclosure 2021
6 Environmental Protection: Practicing Green Operation to Build a Strong Ecological Barrier
2 Message from the Chairman GRI 2: General Disclosure 2021
6.1 Addressing Climate Change Article 20 Article 21 Article 24 GRI 201: Economic Performance 2016
3 About Us GRI 2: General Disclosure 2021 GRI 201:
Article 25 Article 26 Article 27 GRI 305: Emissions 2016
Economic Performance 2016
6.2 Environmental Compliance
4 ESG Management Management Article 33
4.1 ESG Governance Structure GRI 2: General Disclosure 2021 GRI 3: Material Topics 2021 6.3 Pollutant Emissions Article 29 Article 30
GRI 303: Water and Effluents 2018 GRI
305: Emissions 2016
4.2 Stakeholder Communication Article 53 GRI 2: General Disclosure 2021
6.4 Waste Disposal Article 31 Article 37 GRI 306: Waste 2020
4.3 Analysis of Topics of Double
Materiality GRI 3: Material Topics 2021
6.5 Energy Utilization Article 34 Article 35 Article 37 GRI 302: Energy 2016
4.4 Linkage of ESG Performance
with Senior Management GRI 2: General Disclosure 2021
Remuneration 6.6 Water Resource Utilization Article 34 Article 36 Article 37 GRI 303: Water and Effluents 2018
5 Corporate Governance: Improving Governance Efficiency for Compliant and Steady Development
6.7 Ecosystem and Biodiversity Article 32 GRI 101: Biodiversity 2024
5.1 Corporate Governance Conservation
5.1.1 Governance Structure GRI 2: General Disclosure 2021
5.1.2 Investor Relations
Management
5.1.3 Internal Control Risk and
Compliance Management Article 52 GRI 2: General Disclosure 2021
5.2 Business Ethics
5.2.1 Anti-corruption and Anti-
commercial Bribery Article 54 Article 55 GRI205: Anti-corruption 2016
5.2.2 Anti-unfair Competition and
Anti-monopoly Article 56 GRI206: Anti-competitive Behavior 2016
13：The Company's core businesses do not involve scientific research technological development and other activities in sensitive
fields such as life sciences and artificial intelligence ethics so the basic situation of the Company's compliance with science and
technology ethics during the reporting period is not disclosed in this report.
14:The Company has no overdue payments to small and medium-sized enterprises so this report does not involve contents related
to the equal treatment of small and medium-sized enterprises.
113 1142025 Sustainability Report
Self-Regulatory Guidelines No. The United
17 for Companies Listed on Nations Independent Assurance Statement
Reporting Framework Shenzhen Stock Exchange — GRI Standards Sustainable
Sustainability Report (For Trial Development
Implementation) 13 14 Goals (SDGs)
Shanghai Infaith Management Consulting Co. Ltd. (hereinafter referred to as "Infaith Consulting") as entrusted by
7 Social Contribution: Collaborative Innovation and Win-Win Building a Responsible Future Yunnan Tin Co. Ltd. (hereinafter referred to as "Yunnan Tin") has conducted independent limited assurance of the
environmental social and governance information and data disclosed in Yunnan Tin 2025 Sustainability Report
(hereinafter referred to as "Report") and disclosed the assurance result and conclusion to readers of the Report in
7.1 Innovation-driven Development Article 41 Article 42 the form of independent assurance and statement of opinion.
7.2 Product and Service Safety and Independence and Capability
Quality Article 47 1. All the assurance team members of Infaith Consulting have no business relationship with Yunnan Tin that leads to
conflicts of interest; The team of Infaith Consulting has performed this assurance work independently.
7.3 Data Security and Customer
Privacy Protection Article 48 GRI 418: Customer Privacy 2016 2. The assurance team of Infaith Consulting consists of experienced professionals in the industry. Relevant persons have received professional training on the GRI Standards issued by the Global Reporting Initiative AA1000AS v3
GRI 204: Procurement Practices 2016 ISO 14001 ISO 26000 SA 8000 EcoVadis global supply chain rating and other sustainability-related standards and
have adequate understanding and practical experience in relevant international principles evaluation systems and
7.4 Supply Chain Management Article 45 GRI 308: Supplier Environmental Assessment 2016 GRI 414: Supplier assurance standards.
Social Assessment 2016
7.5 Industry Co-construction and Assurance Statement
Exchange
1. Yunnan Tin management shall be fully held accountable for the preparation and content of the Report. It is the
responsibility of Infaith Consulting to conduct an assurance based on the scope as described herein and to provide
7.6 Employees professional assurance opinions to the Report readers and stakeholders.
2. Based on the assurance scope limits Infaith Consulting shall in accordance with AA1000AS v3 conduct
GRI 2: General Disclosures 2021 GRI independent limited assurance and guarantee conclusion for the matters within the scope defined in the Report.
7.6.1 Protection of Employees' 201: Economic Performance 2016 In addition to providing independent assurance and making other statements of opinion on the facts of assurance
Rights and Interests GRI 401: Employment 2016 GRI 405: under the conclusion Infaith Consulting will not assume any legal or other liabilities for any inquiries for any other
Diversity and Equal Opportunity 2016 purposes or for any other persons who read this Independent Assurance and Statement of Opinion.Article 49 Article 50
7.6.2 Employee Training and 3. If you have any questions about the contents contained herein or related matters Yunnan Tin will reply in a lump
Development GRI 404: Training and Education 2016 sum.
7.6.3 Employee Care GRI 401: Employment 2016 4. In the event of any conflict or inconsistency between the Chinese version and the English version of this Independent Assurance and Statement of Opinion the Chinese version shall prevail.
7.6.4 Occupational Health and GRI 403: Occupational Health and
Safety Production Safety 2018 Assurance Standard
7.7 Rural Revitalization and Social
Contribution Infaith Consulting adopts AA1000AS v3 type-1 medium assurance level which includes Yunnan Tin's evaluation of the compliance situation and degree of the four AA1000AS v3 assurance principles including inclusiveness
substantiality responsiveness and impact.
7.7.1 Rural Revitalization Article 38 Article 39 GRI 203: Indirect Economic Impact 2016
Assurance Scope
7.7.2 Social Contribution Article 38 Article 40 1. The assurance scope is limited to the information and data of Yunnan Tin and its affiliated companies covered by
the Report excluding the data and information of Yunnan Tin suppliers contractors and other third parties.Appendix 2. Infaith Consulting adopts AA1000AS v3 type-1 moderate assurance level to evaluate Yunnan Tin's compliance
nature and degree of the four assurance principles in AA1000AS v3.ESG Performance Data Sheet
Assurance Process and Work
Index Table
In order to collect evidence related to the conclusion Infaith Consulting has carried out the following work:
Independent Assurance Statement GRI 2: General Disclosure 2021 1. Interview with the senior management team and employees of Yunnan Tin to understand the overall situation and
related processes of Yunnan Tin in fulfilling its corporate environmental social and governance responsibilities.Reader Feedback Form 2. Verify the key development and policy implementation of relevant organizations of Yunnan Tin and the supporting
115 1162025 Sustainability Report
evidence of the announcement made in the verification report. non-financial information the application of different but acceptable information and measurement technologies
3. Through interviews and inspection of relevant documents understand the expectations and needs of major may affect the comparability with other institutions.
stakeholders and stakeholders of Yunnan Tin the specific communication channels between the two parties and
how Yunnan Tin responds to the expectations and needs of stakeholders. If you have any advice for this Independent Assurance and Statement of Opinion you may contact:
4. Select the information related to environment society and governance in this report carry out analytical
verification procedures and overall performance of this information and evaluate and verify whether it is consistent Tel: 021-20740303
with the contents of the report. Email: esg@Infaith.com.cn
5. Verify the process management of the principles of inclusiveness materiality responsiveness and impact in the Address: Floor 17 Building T1 Lujiazui Binjiang Center No. 257 Binjiang Avenue Pudong New District Shanghai
report and its related AA1000AS v3 to confirm the appropriateness of this statement.
6. Sampling inspection on supporting evidence of data reliability and quality of selected specific performance
information.
7. Recalculate and verify the selected specific performance information.
8. Perform other procedures deemed necessary by Infaith Consulting.
Assurance Conclusions
1. According to the information provided by Yunnan Tin and the sample test there is no material misrepresentation
in the Report.
2. For the principles of inclusiveness substantiality responsiveness and impact included in AA1000AS v3 the detailed
assurance conclusions are as follows: Infaith Consulting
Shanghai March 2026
According to the Report Yunnan Tin has taken important measures including continuously
seeking the participation of stakeholders in the business operation understanding their
Inclusiveness expectations and concerns communicating about and confirming substantive issues in a
timely manner etc. to respond responsibly and strategically to stakeholders related to the
social responsibilities of the Company.Yunnan Tin has announced major topics that will have substantial influence and impact
Substantiality on the evaluation decision-making actions and performance of the organization and its
stakeholders and judged and improved the management and performance of the issues.Responsiveness Yunnan Tin has implemented relevant policies and is able to respond to issues that concern the stakeholders in a timely manner.Yunnan Tin has the adequate ability to identify substantive issues. It has implemented
balanced and effective evaluation and disclosure methods and has established a systematic
Impact process for monitoring measurement evaluation and management impact so as to achieve
more efficient management of decision-making and results within the organization and
demonstrate the impact of the substantive issues in an impartial and objective manner.
3. Based on the procedures implemented and the evidence obtained by Infaith Consulting we have found nothing
that causes us to doubt the reliability and quality of the specific performance indicators selected in the Report.Limitation
The assurance process was carried out at the location within the scope of the Report;
Because there is no internationally recognized and commonly used standard for the evaluation and measurement of
117 118Reader Feedback Form
Dear readers
Hello!
Thank you very much for taking the time to read the 2025 Sustainability Report of Yunnan Tin Company Limited.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 opinions and suggestions.Multiple Choice (Please check √ in the appropriate box)
1.Your overall assessment of the report:
□ Very Good □ Good □ Average □ Below Average □ Poor
2.Does the report respond to and disclose issues of concern to stakeholders
□ Very Good □ Good □ Average □ Below Average □ Poor
3.How do you think Yunnan Tin has performed on environmental topics
□ Very Good □ Good □ Average □ Below Average □ Poor
4.How do you think Yunnan Tin has performed on social topics
□ Very Good □ Good □ Average □ Below Average □ Poor
5.How do you think Yunnan Tin has performed on corporate governance topics
□ Very Good □ Good □ Average □ Below Average □ Poor
6.Do you think the information indicators and data disclosed in this report are clear accurate and complete
□ Very Good □ Good □ Average □ Below Average □ Poor
7.Do you think the organization and layout design of the report are easy to read
□ Yes □ No
Open-ended Question
What are your opinions and suggestions regarding the ESG work of Yunnan Tin
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