Report on Shareholder Inquiry Transfer Results and Notice of Changes in Shareholding Exceeding 5%

1. Securities Code: 301522
   Securities Abbreviation: Shangda Co., Ltd.
   Announcement Number: 2026-031

Report on Shareholder Inquiry Transfer Results and Notice of Changes in Shareholding Exceeding 5%

The shareholder AVIC Heavy Machinery Co., Ltd. guarantees that the information provided to the company is true, accurate, and complete, with no false records, misleading statements, or significant omissions. The company and all members of the board guarantee that the announcement content is consistent with the information provided by the information disclosure obligor.

Important Notice:

1. The subject of this equity change is the shareholder AVIC Heavy Machinery Co., Ltd. (hereinafter referred to as "AVIC Heavy Machinery" or "Transferor"), which holds more than 5% of the shares of Zhonghe Shangda Aviation Materials Co., Ltd. (hereinafter referred to as "the Company"). The method of this equity change is through inquiry transfer, after which the Transferor's shareholding ratio in the total share capital of the company decreases from 13.45% to 9.22% (hereinafter referred to as "this equity change"), touching the integer multiple of 5%.
2. The Transferor is a shareholder holding more than 5% of the company’s shares. This equity change will not lead to a change in the company's controlling shareholder or actual controller and will not have a significant impact on the company's governance structure and ongoing operations.
3. This inquiry transfer is a non-public transfer method and does not involve centralized bidding or block trading, thus not triggering a tender offer. The shares acquired through the inquiry transfer cannot be transferred within six months after acquisition.
4. The number of shares transferred by the Transferor through the inquiry transfer is 15,700,000 shares, accounting for 4.22% of the company's total share capital; the inquiry transfer price is 26.10 CNY/share, with a transaction amount of 409,770,000.00 CNY.
5. As of the date of this announcement, the aforementioned inquiry transfer has been completed.

I. Information on the Transferor

(1) Basic Information of the Transferor

The Transferor has entrusted AVIC Securities Co., Ltd. (hereinafter referred to as "AVIC Securities") to organize the implementation of the company's pre-IPO shareholder inquiry transfer (hereinafter referred to as "this inquiry transfer"), planning to transfer 15,700,000 shares, accounting for 4.22% of the company's total share capital. For details, see the company's disclosed "Shareholder Inquiry Transfer Plan of Zhonghe Shangda Aviation Materials Co., Ltd." (Announcement Number: 2026-028), "Notice of Pricing for Shareholder Inquiry Transfer of Zhonghe Shangda Aviation Materials Co., Ltd." (Announcement Number: 2026-030), and AVIC Securities' "Verification Opinion on the Qualifications of Shareholders Transferring Shares to Specific Institutional Investors." As of May 25, 2026, the number of shares held by the Transferor and the proportion of total share capital are as follows:

As of the date of this announcement, the aforementioned inquiry transfer plan has been completed. The actual number of shares transferred by the Transferor is 15,700,000 shares, with an inquiry transfer price of 26.10 CNY/share, resulting in a transaction amount of 409,770,000.00 CNY.

(2) Consistent Action Relationship of the Transferor

The Transferor, AVIC Heavy Machinery, has no concerted action parties.

(3) Whether the Transferor is the Company's Controlling Shareholder, Actual Controller, Shareholder Holding More Than 5%, Director, or Senior Management

The Transferor, AVIC Heavy Machinery, is not the company's controlling shareholder, actual controller, director, or senior management, and its shareholding exceeds 5%.

(4) Specifics of the Transfer

The upper limit of shares proposed for inquiry transfer is 15,700,000 shares. After allocation to the transferee, the inquiry transfer situation is as follows: