Stock code: 688563 Stock abbreviation: Aviation Materials Co., Ltd

Beijing Institute of Aeronautical Materials Co., Ltd

2024 Second Extraordinary General Meeting of Shareholders Meeting Materials

December 2024

Beijing Institute of Aeronautical Materials Co., Ltd

2024 Second Extraordinary General Meeting of Shareholders Meeting Materials Catalog

Notice of the 2024 Second Extraordinary General Meeting of Shareholders ...... 1

2024 Second Extraordinary General Meeting of Shareholders Meeting Agenda ...... 3

2024 Second Extraordinary General Meeting of Shareholders Meeting Proposal ...... 5

Proposal 1 Proposal on the change of accounting firm...... 5

Proposal 2 Proposal on the general election of the board of directors of the company and the election of non-independent directors of the second board of directors...... 8

Proposal 3 Proposal on the general election of the board of directors of the company and the election of independent directors of the second board of directors...... 11. Proposal 4 on the general election of the board of supervisors of the company and the election of non-employee representative supervisors of the second board of supervisors...... 13

Notice to the 2024 Second Extraordinary General Meeting of Shareholders

In order to safeguard the legitimate rights and interests of all shareholders, ensure the normal order and efficiency of the general meeting of shareholders, and ensure the smooth progress of the general meeting, in accordance with the "Company Law of the People's Republic of China", "Securities Law of the People's Republic of China", "Rules of the General Meeting of Shareholders of Listed Companies", "Articles of Association of Beijing Institute of Aeronautical Materials Co., Ltd.", "Rules of Procedure of the General Meeting of Shareholders of Beijing Institute of Aeronautical Materials Co., Ltd." and other relevant regulations, the instructions for the second extraordinary general meeting of shareholders in 2024 are hereby formulated.

1. In order to ensure the seriousness and normal order of the meeting, and effectively safeguard the legitimate rights and interests of the shareholders (or shareholders' agents) attending the meeting, the company has the right to refuse other personnel to enter the venue in accordance with the law, except for the shareholders (or shareholders' agents) attending the meeting, the company's directors, supervisors, senior managers, witness lawyers and persons invited by the board of directors.

2. Shareholders (or shareholders' representatives) attending the meeting must go through the sign-in procedures at the meeting site 30 minutes before the meeting, and please present the securities account card, identity documents or copies of the business license/registration certificate of the enterprise (with official seal), power of attorney, etc., and receive the meeting materials after verification before attending the meeting.

After the start of the meeting, the presiding officer of the meeting announces the number of shareholders present at the meeting and the total number of shares with voting rights held by them, and shareholders who enter the meeting after this time are not entitled to participate in the on-site voting.

3. Shareholders and their representatives shall enjoy the right to speak, question and vote in accordance with the law when participating in the general meeting of shareholders. Shareholders and their representatives participating in the general meeting of shareholders shall conscientiously perform their statutory obligations, shall not infringe upon the legitimate rights and interests of the company and other shareholders and shareholders' representatives, and shall not disturb the normal order of the general meeting of shareholders.

4. Shareholders and their representatives who request to speak at the on-site meeting of the general meeting of shareholders shall register with the conference affairs group of the general meeting one working day before the general meeting of shareholders. The presiding officer of the conference will arrange the speeches according to the list and order provided by the conference affairs group. Shareholders and shareholders' representatives who request questions on the spot shall raise their hands in accordance with the agenda of the meeting, and only ask questions with the permission of the presiding officer of the meeting. When multiple shareholders and their representatives ask questions at the same time, the one who raises his hand first will ask questions first; If the order cannot be determined, the moderator shall designate the questioner. Only shareholders and shareholders' proxies will be accepted to speak or ask questions during the meeting. Presentations or questions should be concise and to the point in relation to the topic of the meeting, and should not exceed 5 minutes. When speaking or asking questions, the name of the shareholder and the total number of shares held must be stated. Each shareholder and the shareholder's representative shall not speak or ask questions more than 2 times.

5. When shareholders and their representatives request to speak, they shall not interrupt the report of the meeting rapporteur or the speeches of other shareholders and their representatives. Shareholders and their proxies shall not speak at the time of voting at the general meeting of shareholders. If the shareholders and their representatives violate the above provisions, the presiding officer has the right to refuse or stop them.

6. The moderator may arrange for the company's directors, supervisors and senior managers to answer questions raised by shareholders. For the possible will

The moderator or the relevant personnel designated by the host have the right to refuse to answer questions that leak the company's trade secrets and/or inside information and damage the common interests of the company and shareholders.

7. In order to improve the efficiency of the shareholders' meeting, on-site voting will be conducted after answering the shareholders' questions. For non-cumulative voting proposals, shareholders should choose one of the three items of "agree", "oppose" and "abstain" under each proposal in the voting ballot, and indicate it by "√"; For the cumulative voting proposal, please refer to the "Instructions on the Voting Method for the Election of Directors, Independent Directors and Supervisors by Adopting the Cumulative Voting System" (for details, please refer to Annex 2 in the notice and announcement of this general meeting of shareholders) for voting. Votes that are not filled, incorrect, illegible or not cast shall be considered as abstentions. Shareholders are requested to fill in the voting ballot according to the voting requirements, and the staff of the general meeting will collect it uniformly.

8. The on-site meeting of the general meeting of shareholders elected 1 shareholder representative and 1 supervisor as the tellers, and 1 shareholder representative,

One lawyer is the scrutineer, responsible for the statistics and supervision of the voting situation, and signs the voting results of the bill.

9. The general meeting of shareholders adopts a combination of on-site voting and online voting, and the announcement of the resolution of the general meeting of shareholders is issued in combination with the voting results of on-site voting and online voting.

10. The meeting was witnessed and issued by the practicing lawyers of the law firm hired by the company.

11. During the meeting, participants should pay attention to maintaining the order of the venue, do not move around at will, adjust the mobile phone to mute state, refuse personal audio recording, video recording and photography during the meeting, and participants should leave the venue after the conference without special reasons. The staff of the meeting have the right to stop the acts that interfere with the normal procedures of the meeting, pick quarrels and provoke troubles, or infringe on the legitimate rights and interests of other shareholders, and report to the relevant departments for handling.

12. For the specific content of the registration method and voting method of this general meeting of shareholders, please refer to the company's announcement in December 2024

The "Notice on Convening the Second Extraordinary General Meeting of Shareholders in 2024" (Announcement No.: 2024-043) disclosed on the website of the Shanghai Stock Exchange on the 12th.

Beijing Institute of Aeronautical Materials Co., Ltd

Agenda for the 2nd Extraordinary General Meeting of Shareholders in 2024

1. Time, place and voting method of the meeting

(1) On-site meeting time: 14:30 on December 27, 2024 (Friday).

(2) On-site meeting place: conference room of Beijing Institute of Aeronautical Materials Co., Ltd

(3) Convener of the meeting: Board of Directors of Beijing Institute of Aeronautical Materials Co., Ltd

(4) Presiding officer: Mr. Yang Hui, chairman of the board

(5) Online voting system: the online voting system of the general meeting of shareholders of the Shanghai Stock Exchange

Online voting starts and ends on December 27, 2024

Until December 27, 2024

Using the online voting system of the Shanghai Stock Exchange, the voting time through the voting platform of the trading system is the trading time of the day of the general meeting of shareholders, that is, 9:15-9:25, 9:30-11:30, 13:00-15:00, and the voting time through the Internet voting platform is 9:15-15:00 on the day of the general meeting of shareholders.

2. Agenda of the meeting

(1) Participants sign in, receive meeting materials, and confirm the registration of shareholders' speeches

(2) The presiding officer announces the opening of the meeting and reports to the general meeting the number of shareholders attending the on-site meeting and the number of voting rights held

(3) The presiding officer reads out the instructions for the general meeting of shareholders

(D) the election of tellers and scrutineers

(5) To deliberate on the proposals of the meeting

Proposal 1: "Proposal on Changing the Accounting Firm"

Proposal 2: "Proposal on the General Election of the Board of Directors of the Company and the Election of Non-Independent Directors of the Second Board of Directors"

Proposal 3: "Proposal on the General Election of the Board of Directors of the Company and the Election of Independent Directors of the Second Board of Directors"

Proposal 4: "Proposal on the General Election of the Board of Supervisors of the Company and the Election of Non-employee Representative Supervisors of the Second Board of Supervisors"

(6) Shareholders and shareholders' representatives at the meeting make speeches and ask questions

(7) Shareholders and shareholders' representatives at the meeting vote on various proposals

(viii) Adjournment (statistics of voting results)

(9) Resuming the meeting, announcing the voting results of the meeting, and passing the bills

(10) The presiding officer reads out the resolution of the general meeting of shareholders

(11) Witness the lawyer's reading of the legal opinion

(xii) Sign the documents of the Conference

(xiii) Closure of the session

Beijing Institute of Aeronautical Materials Co., Ltd

2024 Second Extraordinary General Meeting of Shareholders Meeting Proposals

Motion 1

Proposal on the change of accounting firm

Dear Shareholders,

In accordance with the relevant regulations of the Ministry of Finance, the State-owned Assets Supervision and Administration Commission of the State Council and the China Securities Regulatory Commission on the selection and appointment of accounting firms, taking into account the company's business development and demand for audit services, Beijing Institute of Aeronautical Materials Co., Ltd. (hereinafter referred to as the "Company") intends to hire Grant Thornton Certified Public Accountants (Special General Partnership) (hereinafter referred to as "Grant Thornton Certified Public Accountants") as the company's 2024 financial report and internal control auditor after performing the relevant procedures in accordance with the relevant procedures.

1. The basic information of the accounting firm to be employed

(1) Institutional information

1. Basic Information

Name of Accounting Firm: Grant Thornton Certified Public Accountants (Special General Partnership)

Date of Establishment: December 22, 2011

Registered address: 5th Floor, Scitech Plaza, No. 22 Jianguomenwai Street, Chaoyang District, Beijing

Senior Partner: Li Huiqi

As of the end of 2023, Grant Thornton has nearly 6,000 employees, including 225 partners, registered

There are 1,364 accountants and more than 400 certified public accountants who have signed audit reports on securities service business.

Grant Thornton's business income in 2023 will be 2.703 billion yuan, of which 2.205 billion yuan will be from audit business

yuan, securities business income of 502 million yuan. In the 2023 annual report, 257 listed companies audited clients, including the system

manufacturing, information transmission, software and information technology services, wholesale and retail trade, electricity, heat, gas and water production and supply, transportation, warehousing and postal services, etc., with a total fee of 355 million yuan. The company has 6 audit clients of listed companies in the same industry.

2. Investor protection capabilities

Grant Thornton has purchased professional insurance, with a cumulative compensation limit of 900 million yuan, and the purchase of occupational insurance is in line with relevant regulations. At the end of 2023, the occupational risk fund will be 8.1509 million yuan.

Grant Thornton is not required to bear civil liability for civil lawsuits related to professional conduct that have been concluded in the past three years.

3. Integrity record

In the past three years, Grant Thornton has been subject to 0 criminal penalties, 1 administrative penalty, and supervision and management for its professional behavior

11 disciplinary measures, 5 self-regulatory measures and 1 disciplinary action. 41 practitioners have been injured in the past three years for their professional conduct

to 0 criminal penalties, 10 administrative penalties, 11 supervision and management measures, 5 self-regulatory measures and disciplinary punishments

Divide 1 time.

(2) Project information

1. Basic Information

Project Partner: Yang Zhi, became a certified public accountant in 2008, began to engage in the audit of listed companies in 2008, began to practice in Grant Thornton in 2008, and signed 6 audit reports of listed companies in the past three years.

Project Signing Certified Public Accountant: Li Chunxu, became a certified public accountant in 2015, began to engage in the audit of listed companies in 2013, and began to practice in Grant Thornton Certified Public Accountants in 2007; In the past three years, he has signed 3 audit reports of listed companies.

Project Quality Review Partner: Bai Jing, became a certified public accountant in 2007, began to engage in the audit of listed companies in 2005, and began to practice in Grant Thornton in 2005; In the past three years, 5 audit reports of listed companies have been signed, and 1 audit report of listed companies has been reviewed.

2. Integrity record

In the past three years, the project partners, the signing certified public accountants, and the project quality review partners have not been subject to criminal penalties for their professional behaviors, administrative penalties, supervision and management measures and self-regulatory measures by the China Securities Regulatory Commission, its dispatched agencies, industry authorities, etc., and have not been subject to self-regulatory measures and disciplinary penalties by self-regulatory organizations such as stock exchanges and industry associations

Divide.

3. Independence

There are no circumstances that may affect the independence of Grant Thornton and its project partners, signatory certified public accountants, and project quality review partners.

4. Audit fees

The audit fee is mainly determined based on the responsibility of the professional service and the degree of professional expertise required, taking into account the experience and level of the employees involved, the corresponding fee rate and the working hours invested.

After comprehensive assessment, the company's audit fee in 2024 is expected to be 950,000 yuan, which is the same as the audit fee in 2023.

Among them, the audit fee of financial report is 700,000 yuan, and the audit fee of internal control is 250,000 yuan.

2. A description of the proposed change of accounting firm

(1) The situation of the former accounting firm and the audit opinion of the previous year

The accounting firm originally hired by the company was Zhongshen Zhonghuan Certified Public Accountants (Special General Partnership), which has provided audit services for the company for 4 consecutive years, and issued a standard unqualified audit report for the company in 2023. The company does not have the situation that the former accounting firm has been entrusted to carry out part of the audit work and then dismissed the former accounting firm.

(2) The reason for the proposed change of the accounting firm

The change of accounting firm is mainly based on the company's demand for audit services, in accordance with the relevant regulations of the Ministry of Finance, the State-owned Assets Supervision and Administration Commission of the State Council, and the China Securities Regulatory Commission on the selection and appointment of accounting firms, after performing the relevant procedures, according to the selection results, the company intends to hire Grant Thornton Certified Public Accountants as the company's 2024 annual financial report and internal control audit institution. At the same time, the board of directors of the company expressed its heartfelt thanks to Zhongshen Zhonghuan Certified Public Accountants (Special General Partnership) for providing professional, rigorous and responsible audit services during its tenure as the company's audit institution.

(3) The communication between the company and the former accounting firms

The Company has fully communicated with the former and former accounting firms regarding the change of accounting firms, and all parties have clearly understood the matter and confirmed that there is no objection. The former accounting firm will actively communicate and cooperate with the CPA in accordance with the Chinese Certified Public Accountants Auditing Standard No. 1153 - Communication between the former CPA and the subsequent CPA and other relevant requirements.

This proposal has been deliberated and passed at the 20th meeting of the first board of directors and the 17th meeting of the first board of supervisors, and was disclosed on the website of the Shanghai Stock Exchange (www.sse.com.cn) on December 12, 2024 in the "Announcement on the Change of Accounting Firm for 2024" (Announcement No.: 2024-042).

The above proposals are for consideration by shareholders.

Beijing Institute of Aeronautical Materials Co., Ltd

December 27, 2024

Bill II

Regarding the general election of the board of directors of the company and the election of non-independent directors of the second board of directors

of motions

Dear Shareholders,

The term of the first board of directors of the company is about to expire, and in accordance with the "Company Law", "Shanghai Stock Exchange Science and Technology Innovation Board Listing Rules" and other laws and regulations, as well as the "Articles of Association", "Rules of Procedure of the Board of Directors" and other relevant provisions, the board of directors of the company decided to carry out the general election of the board of directors in accordance with relevant legal procedures.

Nominated by AECC Beijing Institute of Aeronautical Materials (hereinafter referred to as "AECC Institute") and AECC Asset Management Co., Ltd. (hereinafter referred to as "AECC Assets"), and reviewed by the Nomination Committee of the Board of Directors for the qualifications of non-independent director candidates for the second session of the Board of Directors, the Board of Directors of the Company agreed to elect Mr. Yang Hui, Mr. Qian Xichang, Mr. Tang Bin, Mr. Liu Xiaoguang, Mr. Tang Zhizhi and Ms. Liu Ying as candidates for non-independent directors of the second session of the Board of Directors of the Company for a term of three years. The term of office shall be from the date of deliberation and approval of the general meeting of shareholders of the company to the expiration of the term of the second board of directors. For details of the above-mentioned non-independent director candidates, please refer to the resume attached to this proposal.

This proposal will adopt a cumulative voting system, and vote item by item in the form of sub-proposals:

2.01 "Proposal on Electing Mr. Yang Hui as a Non-Independent Director of the Second Board of Directors of the Company"

2.02 "Proposal on Electing Mr. Qian Xichang as a Non-Independent Director of the Second Board of Directors of the Company"

2.03 "Proposal on Electing Mr. Tang Bin as a Non-Independent Director of the Second Board of Directors of the Company"

2.04 "Proposal on Electing Mr. Liu Xiaoguang as a Non-Independent Director of the Second Board of Directors of the Company"

2.05 "Proposal on Electing Mr. Tang Zhizhi as a Non-Independent Director of the Second Board of Directors of the Company"

2.06 Proposal on Electing Ms. Liu Ying as a Non-Independent Director of the Second Board of Directors of the Company

This proposal has been deliberated and passed at the 20th meeting of the first board of directors, and was disclosed on the website of the Shanghai Stock Exchange (www.sse.com.cn) on December 12, 2024 in the "Announcement on the General Election of the Board of Directors and the Board of Supervisors" (Announcement No.: 2024-039).

The above proposals are for consideration by shareholders.

Beijing Institute of Aeronautical Materials Co., Ltd

December 27, 2024

Annex to Bill II

Curriculum vitae of candidates for non-independent directors

1. Biography of Mr. Yang Hui

Mr. Yang Hui, born in 1968, Chinese nationality, no right of permanent residence abroad, doctoral degree, researcher. He has successively served as Deputy Director of the 11th Office of the Flight Control Department of AVIC Xi'an Flight Automatic Control Research Institute, Deputy Director of the Flight Control Department of AVIC Xi'an Flight Automatic Control Research Institute, Deputy Director, Director and Deputy Secretary of the Party Committee of AECC Aviation Power Control System Research Institute. He is currently the president and deputy secretary of the Party Committee of AECC Beijing Institute of Aeronautical Materials, and the chairman of the company.

2. Curriculum vitae of Mr. Qian Xichang

Mr. Qian Xichang, born in 1965, Chinese nationality, no right of permanent residence abroad, master's degree, researcher. He has successively served as Deputy Director of the First Research Office and Secretary of the Party Branch of AECC Beijing Institute of Aeronautical Materials, Secretary of the Party Branch, Deputy Director and Director of the Development Department, Director of the Product Development Department, Secretary of the Party Branch, Assistant to the President, Deputy Secretary of the Party Committee and Vice President and Vice President of AECC Beijing Institute of Aeronautical Materials, and Deputy Director of the Asset Management Department of Aero Engine Corporation of China. He is currently the vice chairman of the company.

3. Biography of Mr. Tang Bin

Mr. Tang Bin, born in 1968, Chinese nationality, no right of permanent residence abroad, master's degree, researcher. He has successively served as Deputy Director of the Institute and Director of the Archives Center of AECC Beijing Institute of Aeronautical Materials, Deputy Director of the General Management Department and Secretary of the Party Branch, Director of the General Management Department and Deputy Chief Engineer. He is currently the vice president of AECC Beijing Institute of Aeronautical Materials, the chairman of Hexing Aviation Materials (Tianjin) Technology Co., Ltd., the chairman of AVIC Armored Technology Co., Ltd., and the director of the company.

4. Curriculum vitae of Mr. Liu Xiaoguang

Mr. Liu Xiaoguang, born in 1976, Chinese nationality, no right of permanent residence abroad, doctoral degree, researcher. He has successively served as Deputy Director of the Product Development Department of AECC Beijing Institute of Aeronautical Materials, Secretary of the Party Branch and Deputy Director of the First Research Institute of AECC Beijing Institute of Aeronautical Materials, Vice President and Secretary of the Party Branch of the First Research Institute of AECC Beijing Institute of Aeronautical Materials, General Manager and Deputy Secretary of the Party Committee of Guiyang Hangfa Precision Casting Co., Ltd. He is currently the vice president of AECC Beijing Institute of Aeronautical Materials, the chairman and secretary of the Party Committee of Guiyang AECC Precision Casting Co., Ltd., and the director of the company.

5. Resume of Mr. Tang Zhizhi

Mr. Tang Zhizhi, born in 1974, Chinese nationality, no right of permanent residence abroad, doctoral degree, researcher. He has successively served as Deputy Director of the Fifth Research Office, Secretary of the Party Branch, Director of the Fifth Research Institute of AECC Aviation Materials Institute, and Director of the Fifth Research Institute. He is currently the vice president of AECC Beijing Institute of Aeronautical Materials, a director of AVIC Bermuda New Material Technology Engineering Co., Ltd., and a director of AVIC Armor Technology Co., Ltd.

6. Curriculum vitae of Ms. Liu Ying

Ms. Liu Ying, born in 1978, Chinese nationality, no right of permanent residence abroad, master's degree, senior auditor. He has successively served as the Deputy Director of the Foreign Investment Division of the Office of the Commissioner of the National Audit Office in Changsha, the Special Business Manager of the Risk Management Department of AVIC Finance Co., Ltd., the Deputy Director of the Discipline Inspection and Audit Department of AVIC Capital Holding Co., Ltd., and the Director of the Risk and Compliance Department of AECC Asset Management Co., Ltd. He is currently a member of the Party Committee and Deputy General Manager of AECC Asset Management Co., Ltd., the Chairman of AECC Fund Management Co., Ltd., a director of AECC Group Finance Co., Ltd., a director of Qingdao Yunlu Advanced Materials Technology Co., Ltd., and a director of the Company.

Motion three

Regarding the general election of the board of directors of the company and the election of independent directors of the second board of directors

motion

Dear Shareholders,

The term of the first board of directors of the company is about to expire, and in accordance with the "Company Law", "Shanghai Stock Exchange Science and Technology Innovation Board Listing Rules" and other laws and regulations, as well as the "Articles of Association", "Rules of Procedure of the Board of Directors" and other relevant provisions, the board of directors of the company decided to carry out the general election of the board of directors in accordance with relevant legal procedures.

The Board of Directors of the Company agreed to elect Mr. Huang Jin, Mr. Ye Zhongming (accounting professional) and Mr. Yu Hao as candidates for independent directors of the second session of the Board of Directors for a term of three years, from the date of deliberation and approval of the general meeting of shareholders of the Company to the expiration of the term of office of the second session of the Board of Directors. For the specific situation of the above-mentioned independent director candidates, please refer to the resume attached to this proposal.

This proposal will adopt a cumulative voting system, and vote item by item in the form of sub-proposals:

3.01 "Proposal on Electing Mr. Huang Jin as an Independent Director of the Second Board of Directors of the Company"

3.02 "Proposal on Electing Mr. Ye Zhongming as an Independent Director of the Second Board of Directors of the Company"

3.03 "Proposal on Electing Mr. Yu Hao as an Independent Director of the Second Board of Directors of the Company"

This proposal has been deliberated and passed at the 20th meeting of the first board of directors, and was disclosed on the website of the Shanghai Stock Exchange (www.sse.com.cn) on December 12, 2024 in the "Announcement on the General Election of the Board of Directors and the Board of Supervisors" (Announcement No.: 2024-039).

The above proposals are for consideration by shareholders.

Beijing Institute of Aeronautical Materials Co., Ltd

December 27, 2024

Annex to Bill III

Curriculum vitae of candidates for independent directorship

1. Biography of Mr. Huang Jin

Mr. Huang Jin, born in 1958, Chinese nationality, no right of permanent residence abroad, doctoral candidate, professor. He has successively served as Director of the Institute of International Law, Vice Dean of the School of Law, Assistant to the President and Director of the Department of Academic Affairs, Director and Vice President of the Institute of Higher Education, and President, Professor and Professor of China University of Political Science and Law. He is currently a senior professor of Wuhan University, an independent director of Giant Bio Holdings Co., Ltd. and Cinda Securities Co., Ltd., and an independent director of the company.

2. Biography of Mr. Ye Zhongming

Mr. Ye Zhongming, born in 1968, Chinese nationality, no right of permanent residence abroad, master's degree candidate, professor. He has successively served as Deputy Director of the Accounting Department, Director of the Scientific Research Division, Director of the Graduate Division, Director of the Discipline Office of Zhengzhou Institute of Aeronautical Industry Management, and an independent director of Zhengzhou Antu Bioengineering Co., Ltd. He is currently a professor of the Department of Accounting of Zhengzhou Institute of Aeronautical Industry Management, the director of Henan Audit Development Research Center (part-time), an independent director of Henan Xiangyu Medical Equipment Co., Ltd., and an independent director of the company.

3. Biography of Mr. Yu Hao

Mr. Yu Hao, born in 1957, Chinese nationality, no right of permanent residence abroad, bachelor degree, researcher-level senior engineer. He successively served as Deputy Director of Manufacturing Engineering, Deputy Chief Metallurgist and Chief Metallurgist of Shenyang Aircraft Industry (Group) Co., Ltd. He is currently an independent director of the Company.

Bill IV

Regarding the general election of the board of supervisors of the company and the election of non-employee representatives of the second board of supervisors

Supervisors' proposals

Dear Shareholders,

The term of office of the first board of supervisors of the company is about to expire, and in accordance with the "Company Law", "Rules for the Listing of Stocks on the Science and Technology Innovation Board of the Shanghai Stock Exchange" and other laws and regulations, as well as the "Articles of Association", "Rules of Procedure of the Board of Supervisors" and other relevant provisions, the board of supervisors of the company decided to carry out the general election of the board of supervisors in accordance with relevant legal procedures.

Nominated by the Aviation Materials Institute and Hangfa Assets, the Board of Supervisors of the Company agreed to elect Mr. Wu Wensheng, Mr. Li Xingwu and Ms. Zhang Xiao as candidates for non-employee representative supervisors of the second board of supervisors of the Company for a term of three years, and the term of office shall be from the date of deliberation and approval of the general meeting of shareholders of the Company to the expiration of the term of the second board of supervisors. The specific situation of the above-mentioned candidates for non-employee representative supervisors is detailed in the resume attached to this proposal.

This proposal will adopt a cumulative voting system, and vote item by item in the form of sub-proposals:

4.01 Proposal on Electing Mr. Wu Wensheng as a Non-employee Representative Supervisor of the Second Board of Supervisors of the Company

4.02 "Proposal on Electing Mr. Li Xingwu as a Non-employee Representative Supervisor of the Second Board of Supervisors of the Company"

4.03 Proposal on Electing Ms. Zhang Xiao as a Non-employee Representative Supervisor of the Second Board of Supervisors of the Company

This proposal has been deliberated and passed at the 17th meeting of the first board of supervisors, and was disclosed on the website of the Shanghai Stock Exchange (www.sse.com.cn) on December 12, 2024 in the "Announcement on the General Election of the Board of Directors and the Board of Supervisors" (Announcement No.: 2024-039).

The above proposals are for consideration by shareholders.

Beijing Institute of Aeronautical Materials Co., Ltd

December 27, 2024

Annex to Bill IV

Curriculum vitae of candidates for non-employee representative supervisors

1. Curriculum vitae of Mr. Wu Wensheng

Mr. Wu Wensheng, born in 1971, Chinese nationality, no right of permanent residence abroad, master's degree candidate, researcher-level senior political engineer. He has successively served as Deputy Director of the (Party) Office of AECC Shenyang Engine Research Institute, Director of the Propaganda Department of the Party Committee, Member of the Party Committee, Director of the Organization Department, Deputy Secretary of the Party Committee, Secretary of the Discipline Inspection Commission, Chairman of the Labor Union, Secretary of the Party Committee, Deputy Director, Director and Deputy Secretary of the Party Committee. He is currently the Secretary of the Party Committee and Vice President of AECC Beijing Institute of Aeronautical Materials, and the Chairman of the Board of Supervisors of the Company.

2. Biography of Mr. Li Xingwu

Mr. Li Xingwu, born in 1973, Chinese nationality, no right of permanent residence abroad, doctoral candidate, researcher. He has successively served as Secretary of the Party Branch and Deputy Director of the 15th Research Office of AECC Beijing Institute of Aeronautical Materials, Director of the Chief Engineer's Office, and Chairman of AECC ESAB (Beijing) Technology Development Co., Ltd. He is currently the chief engineer and vice president of AECC Beijing Institute of Aeronautical Materials, the vice president of AECC Research Institute, the chairman of Beijing Graphene Technology Research Institute Co., Ltd., and the supervisor of the company.

3. Biography of Ms. Zhang Xiao

Ms. Zhang Xiao, born in 1984, Chinese nationality, no right of permanent residence abroad, master's degree candidate, senior accountant. He has successively served as the business manager in charge of the finance department of AVIC Shixin Gas Turbine Co., Ltd., the business manager in charge of the finance department and the senior business manager of the finance department of AVIC Power Technology Engineering Co., Ltd., and the deputy director of the risk compliance/discipline inspection and supervision department of AECC Asset Management Co., Ltd. He is currently the head of the Risk Compliance/Discipline Inspection and Supervision Department of AECC Asset Management Co., Ltd., the chairman of the board of supervisors of AECC Fund Management Co., Ltd., the supervisor of Fudisi Petrochemical Technology (Huludao) Co., Ltd., the chairman of the board of supervisors of Tongling Tongguan Youchuang Special Materials Co., Ltd., and the supervisor of the company.