Stock code: 688563 Stock abbreviation: Aviation Materials Co., Ltd. Announcement No.: 2024-038

Beijing Institute of Aeronautical Materials Co., Ltd

Announcement of the resolution of the 17th meeting of the first 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.

1. The convening of the meeting of the board of supervisors

The 17th meeting of the first board of supervisors (hereinafter referred to as the "meeting") of Beijing Institute of Aeronautical Materials Co., Ltd. (hereinafter referred to as the "Company") was notified by email on December 6, 2024 and held in the afternoon of December 11, 2024 in the form of an on-site meeting. 5 supervisors should attend the meeting, and 5 actually attended. The meeting was presided over by Wu Wensheng, chairman of the board of supervisors, and the secretary of the board of directors of the company attended the meeting. The convening and convening procedures of the meeting are in accordance with the relevant provisions of the Company Law of the People's Republic of China and other laws and regulations and the Articles of Association of Beijing Institute of Aeronautical Materials Co., Ltd., which are legal and valid.

2. Deliberations of the Board of Supervisors

(1) Reviewed and approved the "Proposal on the General Election of the Board of Supervisors of the Company and the Election of Non-employee Representative Supervisor Candidates of the Second Board of Supervisors"

This proposal will be voted on separately:

1, Wu Wensheng

The result of the vote: 5 votes in favor, 0 votes against and 0 abstentions.

2, Li Xingwu

The result of the vote: 5 votes in favor, 0 votes against and 0 abstentions.

3, Zhang Xiao

The result of the vote: 5 votes in favor, 0 votes against and 0 abstentions.

This proposal shall be submitted to the general meeting of shareholders for deliberation.

For details, please refer to the "Announcement on the General Election of the Board of Directors and the Board of Supervisors" (Announcement No.: 2024-039) disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day.

(2) Reviewed and passed the "Proposal on Foreign Investment and Related Party Transactions"

The result of the vote: 5 votes in favor, 0 votes against and 0 abstentions.

For details, please refer to the "Announcement on Foreign Investment and Related Party Transactions" (Announcement No.: 2024-040) disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day.

(3) Reviewed and approved the "Proposal on Increasing the Estimated Amount of Daily Related Party Transactions in 2024"

The result of the vote: 5 votes in favor, 0 votes against and 0 abstentions.

For details, please refer to the "Announcement on Increasing the Estimated Amount of Daily Connected Transactions in 2024" (Announcement No.: 2024-041) disclosed by the Company on the website (www.sse.com.cn) of the Shanghai Stock Exchange on the same day.

(4) Reviewed and passed the "Proposal on Changing the Accounting Firm"

The result of the vote: 5 votes in favor, 0 votes against and 0 abstentions.

This proposal shall be submitted to the general meeting of shareholders for deliberation.

For details, please refer to the "Announcement on the Change of Accounting Firm" (Announcement No.: 2024-042) disclosed by the Company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day.

3. Documents for reference

(1) Resolution of the 17th Meeting of the First Board of Supervisors of Beijing Institute of Aeronautical Materials Co., Ltd.

The announcement is hereby made.

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

December 12, 2024