Stock code: 688563 Stock abbreviation: Aviation Materials Co., Ltd. Announcement No.: 2024-044

Beijing Institute of Aeronautical Materials Co., Ltd

Announcement on the election of employee representative supervisors of the second board of supervisors

The Board of Supervisors and all the Supervisors of the Company guarantee that there is no false record, misleading statement or material omission in the content of this announcement, and assume legal responsibility for the authenticity, accuracy and completeness of its content.

The term of the first board of supervisors of Beijing Institute of Aeronautical Materials Co., Ltd. (hereinafter referred to as 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", "Self-Regulatory Guidelines for Listed Companies on the Science and Technology Innovation Board of the Shanghai Stock Exchange No. 1 - Standardized Operation" and other laws and regulations, normative documents, as well as the Articles of Association, the Rules of Procedure of the Board of Supervisors and other relevant regulations, the Company held the first session of the second session of the Employee Representative Conference on December 13, 2024. Mr. Li Peihuan and Mr. Jiang Liangbao were elected as the employee representative supervisors of the second board of supervisors of the company (see the attachment for details). According to the Articles of Association, the board of supervisors of the company is composed of 5 supervisors, of which the proportion of employee representatives is not less than 1/3. The employee representative supervisors elected this time will form the second board of supervisors of the company together with the three non-employee representative supervisors elected by the company's second extraordinary general meeting of shareholders in 2024 for a term of three years, and the term of office will be from the date of deliberation and approval of the company's second extraordinary general meeting of shareholders in 2024 to the expiration of the term of the second board of supervisors. Before the election of a new board of supervisors at the general meeting of shareholders, the first board of supervisors of the company will continue to perform its duties.

The announcement is hereby made.

Board of Supervisors of Beijing Institute of Aeronautical Materials Co., Ltd

December 17, 2024

annex

Resume of employee representative supervisors

1. Biography of Mr. Li Peihuan

Mr. Li Peihuan, born in 1991, Chinese nationality, no right of permanent residence abroad, doctoral candidate, senior engineer. He is currently the deputy director of the company's planning and finance department and the secretary of the functional party branch.

Mr. Li Peihuan does not hold any shares of the Company, has no relationship with other directors, supervisors and senior management of the Company, actual controllers and shareholders holding more than 5% of the shares of the Company, has not been punished by the China Securities Regulatory Commission, the Shanghai Stock Exchange and other relevant departments, and his qualifications comply with the provisions of the Company Law, the Rules for the Listing of Stocks on the Shanghai Stock Exchange and other laws and regulations.

2. Resume of Mr. Jiang Liangbao

Mr. Jiang Liangbao, born in 1983, Chinese nationality, no right of permanent residence abroad, doctoral candidate, researcher. He has successively served as a senior engineer and researcher at the Transparent Parts Research Institute of AECC Beijing Institute of Aeronautical Materials, and the deputy director of the Production Department of the Company's Aircraft Cockpit Transparent Parts Division. He is currently a researcher of the company's aircraft cockpit transparent parts division and an employee representative supervisor.

Mr. Jiang Liangbao does not hold any shares of the Company, has no relationship with other directors, supervisors and senior management of the Company, actual controllers and shareholders holding more than 5% of the shares of the Company, has not been punished by the China Securities Regulatory Commission, the Shanghai Stock Exchange and other relevant departments, and his qualifications comply with the provisions of the Company Law, the Rules for the Listing of Stocks on the Shanghai Stock Exchange and other laws and regulations.