Securities code: 688563 Securities abbreviation: Aviation Materials Co., Ltd. Announcement No.: 2024-029

Beijing Institute of Aeronautical Materials Co., Ltd. 2024 semi-annual

Announcement on the implementation of equity distribution

The board of directors and all directors of the company guarantee that there are no false records, misleading statements or material omissions in the content of the announcement, and assume legal responsibility for the authenticity, accuracy and completeness of its content in accordance with the law.

Important Content Notes:

Whether it involves the transfer of differentiated dividends: No

Proportion of distribution per share

Cash dividend per share was $0.18

Relevant dates

Record date: Ex-rights (interest) date, cash dividend payment date

2024/10/10 2024/10/11 2024/10/11

1. The session and date of the general meeting of shareholders for the approval of the distribution plan

The profit distribution plan was approved by the company's first extraordinary general meeting of shareholders in 2024 on September 19, 2024

adopted.

2. Distribution plan

1. Payment year: 2024 semi-annual

2. Assignment Target:

All shareholders of the Company registered with China Securities Depository and Clearing Corporation Shanghai Branch (hereinafter referred to as "ChinaClear Shanghai Branch") after the close of the Shanghai Stock Exchange on the afternoon of the share registration day. 3. Distribution Scheme:

The profit distribution is based on the company's total share capital of 450,000,000 shares before the implementation of the plan, and each share is distributed

A cash dividend of $0.18 (tax included) will pay a total cash dividend of $81,000,000.

3. Relevant Dates

Record date: Ex-rights (interest) date, cash dividend payment date

2024/10/10 2024/10/11 2024/10/11

Fourth, the distribution of implementation measures

1. Implementation Measures

In addition to the company's own distribution targets, the dividends of other shareholders of the company are entrusted to ChinaClear Shanghai Branch through its fund clearing system to be distributed to shareholders who are registered after the close of the Shanghai Stock Exchange on the equity registration date and have completed designated transactions with each member of the Shanghai Stock Exchange. Investors who have completed the designated transactions can receive cash dividends at their designated securities business offices on the dividend payment date, and the dividends of shareholders who have not completed the designated transactions will be temporarily kept by ChinaClear Shanghai Branch and will be distributed after the designated transactions are completed.

2. Self-issuance of objects

The cash dividends of AECC Beijing Institute of Aeronautical Materials, AECC Asset Management Co., Ltd., Zhenjiang High-tech Venture Capital Co., Ltd., Gongqingcheng Aviation Materials No. 2 Investment Partnership (Limited Partnership) and Gongqingcheng Aviation Investment Rongfu Youcai Equity Investment Partnership (Limited Partnership) shall be paid by the Company itself.

3. Tax deduction instructions

(1) For natural person shareholders and securities investment funds who hold the company's unrestricted tradable shares, according to the relevant provisions of the Notice on Issues Concerning the Implementation of the Differentiated Individual Income Tax Policy on Dividends and Dividends of Listed Companies (Cai Shui [2012] No. 85) and the Notice on Issues Concerning the Differentiated Individual Income Tax Policy on Dividends and Dividends of Listed Companies (Cai Shui [2015] No. 101): the shares of listed companies obtained by individuals (including securities investment funds) from the public offering and transfer market, If the holding period (refers to the holding period from the date of acquisition of the company's shares from the public offering and transfer market to the day before the date of transfer and delivery of the shares) exceeds 1 year, the dividend income is temporarily exempted

Income tax per share, with an actual cash dividend of RMB0.18 per share; Shareholding period of less than 1 year (including 1 year)

The company will not withhold individual income tax for the time being, and the actual cash dividend per share will be RMB 0.18, and when individuals (including securities investment funds) transfer shares, ChinaClear Shanghai Branch will hold shares according to their shareholdings

The tax payable shall be deducted from the capital account of the securities company and transferred to the Shanghai Branch of ChinaClear, which shall transfer the tax to the company within 5 working days of the following month, and the company shall declare and pay to the competent tax authorities within the statutory declaration period of the month in which the tax is received.

The specific actual tax burden is: the dividend income of the holding period is less than 1 month (including 1 month).

The full amount is included in the taxable income, and the actual tax burden is 20%; Holding period of more than 1 month to 1 year (including 1 year)

, the temporary reduction shall be included in the taxable income at 50%, and the actual tax burden shall be 10%; If the holding period exceeds 1 year, the income from dividends and dividends is temporarily exempted from individual income tax.

(2) For natural person shareholders and securities investment funds holding the company's tradable shares with limited sale conditions, according to the relevant provisions of the Notice on Issues Concerning the Implementation of the Differentiated Individual Income Tax Policy on Dividends and Dividends of Listed Companies (Cai Shui [2012] No. 85), the dividends and dividends obtained after the lifting of the ban shall be calculated and taxed in accordance with the provisions of item (1) above, and the holding time shall be calculated from the date of lifting the ban; The dividends and dividends obtained before the lifting of the ban shall be temporarily reduced by 50% of the taxable income, and the individual income tax shall be levied at a rate of 20%, and the actual tax burden shall be 10%, and the company shall withhold and pay the income tax at the tax rate of 10%, and the actual cash dividend per share shall be RMB 0.162 after tax deduction.

(3) For non-resident enterprises holding the company's limited sale conditional tradable shares, in accordance with the provisions of the Enterprise Income Tax Law of the People's Republic of China and the Regulations for the Implementation of the Enterprise Income Tax Law of the People's Republic of China, the enterprise income tax rate is levied at a rate of 10%, and the actual cash dividend per share after tax is RMB 0.162. If the relevant shareholders believe that they need to enjoy tax treaty (arrangement) treatment or other preferential tax policies for their dividends and bonus income, they may apply to the in-charge tax authorities on their own in accordance with the regulations.

(4) For shareholders of Qualified Foreign Institutional Investors ("QFIIs") holding shares of the Company, in accordance with the relevant provisions of the Notice on Issues Concerning the Withholding and Payment of Enterprise Income Tax on Dividends, Bonuses and Interest Paid by Chinese Resident Enterprises to QFIIs (Guo Shui Han [2009] No. 47), the Company shall withhold and pay the enterprise income tax at a uniform rate of 10%, and the actual cash dividend per share after tax shall be RMB 0.162. If the relevant shareholders believe that the dividends and dividends they receive need to enjoy any tax treaty (arrangement) treatment or other preferential tax policies, they can do so on their own in accordance with the relevant regulations.

(5) For shareholders of investors (including corporations and individuals) of The Stock Exchange of Hong Kong Limited who hold shares of the Company through the "Shanghai-Hong Kong Stock Connect", their cash dividends will be distributed by the Company through ChinaClear Shanghai Branch in RMB according to the nominee account of the shares. In accordance with the provisions of the Notice on the Tax Policies Concerning the Pilot Program of the Shanghai-Hong Kong Stock Connect Mechanism (Cai Shui [2014] No. 81), the cash dividend will be withheld and paid by the Company at a rate of 10%, and the actual cash dividend per share after tax will be RMB0.162. As relevant

Shareholders who believe that the dividends and dividends they receive need to enjoy any tax treaty (arrangement) treatment or other preferential tax policies can do so on their own in accordance with the relevant regulations.

(6) For other institutional investors and corporate shareholders, the company will not withhold and pay enterprise income tax, and the enterprise income tax on dividends and dividends obtained by them shall be declared and paid by them in accordance with the provisions of the tax law, and the company will distribute cash dividends of RMB 0.18 (tax included) per share.

5. Relevant consultation methods

If you have any questions about this equity distribution, please contact us using the contact information below.

Contact department: Securities Department of Beijing Institute of Aeronautical Materials Co., Ltd

Contact number: 010-62457705

The announcement is hereby made.

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

September 27, 2024