Announcement on the Third Share Repurchase Plan

[Image: Rastar logo]

Stock Code: 300834 Stock Abbreviation: Xinghui Environmental Materials Announcement No.: 2026-031

Rastar Environmental Materials Co., Ltd.

Announcement on the Third Share Repurchase Plan

Important Content Notice:

1. Rastar Environmental Materials Co., Ltd. (hereinafter referred to as the "Company") intends to use its own funds to repurchase its issued RMB ordinary shares (A-shares) through centralized bidding transactions to maintain the Company's value and shareholder equity. The repurchased shares will be sold in accordance with relevant regulations. The total repurchase amount shall be no less than RMB 100 million and no more than RMB 200 million, with a repurchase price not exceeding RMB 65.54 per share. Based on the price cap of RMB 65.54 per share and the maximum repurchase amount, the estimated number of shares to be repurchased is 3.051572 million, representing 1.58% of the Company's current total share capital. Based on the minimum repurchase amount, the estimated number of shares is 1.525786 million, representing 0.79% of the current total share capital. The specific number of shares repurchased shall be based on the actual quantity at the expiration of the repurchase period. The implementation period for the share repurchase shall not exceed 3 months from the date the Board of Directors approves the plan.

2. The Company's directors, senior management, controlling shareholders, actual controllers, and shareholders holding more than 5% of shares have no clear plans to reduce their holdings during the repurchase period or in the next three or six months. If any such entities intend to implement a reduction plan in the future, the Company will fulfill its information disclosure obligations in accordance with relevant regulations.

3. Risk Warning

(1) There is a risk that the repurchase plan may not be implemented or may only be partially implemented if the Company's stock price continuously exceeds the repurchase price cap disclosed in the plan during the repurchase period.

(2) The repurchased shares will be sold in accordance with relevant regulations. If the Company fails to implement this purpose due to changes in circumstances, there is a risk of changing the usage. If the unused portion is cancelled according to law, there is a risk that creditors may require the Company to settle debts in advance or provide corresponding guarantees.

(3) There is a risk that the repurchase may not be implemented due to major events that significantly impact the Company's stock trading price or if the Company decides to terminate the repurchase plan.

(4) If regulatory authorities issue new normative documents related to share repurchases, there is a risk that the Company may need to adjust the terms of the repurchase during the implementation process in accordance with new regulations.

The Company will strive to promote the smooth implementation of this repurchase plan, make repurchase decisions based on market conditions within the repurchase period, and fulfill information disclosure obligations in a timely manner. Investors are advised to pay attention to investment risks.

I. Main Content of the Share Repurchase Plan

1. Purpose of the Share Repurchase

Based on confidence in the Company's future development prospects and high recognition of the Company's value, and to maintain the Company's sustainable, stable, and healthy development and protect investor interests, the Company intends to use its own funds to repurchase shares to maintain the Company's value and shareholder equity.

2. Compliance with Relevant Conditions

The Company's share repurchase complies with the conditions stipulated in Article 10 of the "Self-Regulatory Guidelines for Listed Companies on the Shenzhen Stock Exchange No. 9 — Share Repurchase":

(1) The Company's shares have been listed for more than six months;

(2) The Company has had no major illegal acts in the last year;

(3) After the repurchase, the Company possesses the ability to perform debts and continue operations;

(4) After the repurchase, the Company's equity distribution meets listing conditions;

(5) Other conditions stipulated by the CSRC and the Shenzhen Stock Exchange.