Tibet Gaozheng Civil Explosive Co., Ltd. Announcement on the Progress of Major Litigation Matters of Its Controlling Subsidiary

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Stock Code: 002827 Stock Abbreviation: Gaozheng Minbao Announcement No.: 2026-006

Tibet Gaozheng Minbao Co., Ltd.

Announcement on the Progress of Major Litigation Involving Subsidiaries

Our company and all members of the board of directors guarantee that the information disclosed is true, accurate, and complete, with no false records, misleading statements, or major omissions.

Special Reminder:

1. Litigation stage: Re-trial

2. The company’s role in the case: The controlling subsidiary Chengyuan Mining Development Co., Ltd. is a third party in the lawsuit.

3. Amount involved: 125.7586 million yuan

4. Impact on the company’s profit and loss: The case is currently in the re-trial stage at the Supreme People’s Court. The judgment is uncertain and is not expected to have a significant impact on the company’s current and future profits. The final outcome will be based on the court’s ruling and the auditor’s audit results.

5. Previous announcements regarding this lawsuit

(1) On January 10, 2025, Tibet Gaozheng Minbao Co., Ltd. (hereinafter referred to as “the company” or “Gaozheng Minbao”) disclosed the “Announcement on Major Litigation of Controlling Subsidiary.” The company’s controlling subsidiary Chengyuan Mining Development Co., Ltd. received a summons and a court appearance notice from the Intermediate People’s Court of Changdu City, Tibet Autonomous Region. The case involves a contract dispute filed by Tibet Changdu Gaozheng Building Materials Co., Ltd. (hereinafter “Changdu Gaozheng” or “the plaintiff”) in the Intermediate People’s Court of Changdu City, Tibet.

Details are available in the company’s announcement on January 10, 2025, published in China Securities Journal, Shanghai Securities Journal, Securities Times, Securities Daily, and on the CNINFO website.

(2) On January 21, 2025, the company disclosed an update: Chengyuan Mining received a “Notice of Change of Parties in Litigation” from the Intermediate People’s Court of Changdu City, Tibet. According to Article 59, Paragraph 2 of the Civil Procedure Law of the People’s Republic of China, Chengyuan Mining’s status in the lawsuit was changed from defendant to third party.

Details are available in the company’s announcement on January 21, 2025, published in China Securities Journal, Shanghai Securities Journal, Securities Times, Securities Daily, and on CNINFO.

(3) On April 26, 2025, the company announced that Chengyuan Mining received the “Civil Judgment” (No. [2024]藏03民初4) from the Intermediate People’s Court of Changdu City, Tibet. The judgment dismissed all claims of the plaintiff, Tibet Changdu Gaozheng Building Materials Co., Ltd. The court accepted the case with a fee of 670,593.07 yuan, paid by the plaintiff.

Details are available in the company’s announcement on April 26, 2025, published in China Securities Journal, Shanghai Securities Journal, Securities Times, Securities Daily, and on CNINFO.

(4) On June 12, 2025, the company disclosed that Chengyuan Mining received a “Notice of Appeal” and “Notice of Defense” from the Higher People’s Court of Tibet Autonomous Region. Changdu Gaozheng appealed the first-instance judgment.

Details are available in the company’s announcement on June 12, 2025, published in China Securities Journal, Shanghai Securities Journal, Securities Times, Securities Daily, and on CNINFO.

(5) On August 15, 2025, the company announced that Chengyuan Mining received the “Civil Judgment” (No. [2025]藏民终13) from the Higher People’s Court of Tibet Autonomous Region. The court dismissed the appeal and upheld the original judgment. The second-instance case acceptance fee was 670,593 yuan, paid by Tibet Changdu Gaozheng Building Materials Co., Ltd. This judgment is final.

Details are available in the company’s announcement on August 15, 2025, published in China Securities Journal, Shanghai Securities Journal, Securities Times, Securities Daily, and on CNINFO.

2. Progress of this case

Recently, the company’s controlling subsidiary Chengyuan Mining received a notice of defense from the Supreme People’s Court of China (No. [2026]最高法民申880). Changdu Gaozheng filed for a retrial after losing the second-instance judgment. The Supreme Court has accepted the case for review. The details are as follows:

(1) Court: Supreme People’s Court of China

(2) Location: Dongcheng District, Beijing

(3) Parties involved in the retrial:

• Applicant: Tibet Changdu Gaozheng Building Materials Co., Ltd. (plaintiff in the first instance, appellant in the second)

• Respondents: Sichuan Chuanmei Sixth Engineering Construction Co., Ltd. (defendant in the first instance, appellee in the second), Zhejiang Huazuan Construction Co., Ltd. (defendant in the first, appellee in the second)

• Third party in the original case: Chengyuan Mining Development Co., Ltd.

(4) Requests for retrial:

• Request for a legal ruling to reopen the case;

• Request to revoke the judgments of the Intermediate People’s Court of Changdu (No. [2024]藏03民初4) and the Higher People’s Court of Tibet (No. [2025]藏民终13), and to support the plaintiff Changdu Gaozheng’s original claims;

• Request that the respondents Sichuan Chuanmei Sixth Engineering Construction Co., Ltd. and Zhejiang Huazuan Construction Co., Ltd. bear all litigation costs incurred in the first, second, and retrial.

3. Other undisclosed litigation or arbitration matters

The company and its subsidiaries are not involved in any other major litigation or arbitration that needs disclosure but has not yet been disclosed.

4. Potential impact of this litigation on the company’s current and future profits

As of the date of this announcement, the case is in the retrial stage at the Supreme People’s Court. The judgment is uncertain and is not expected to significantly impact the company’s current or future profits. The final outcome will depend on the court’s ruling and the auditor’s audit results. The company will continue to monitor the case and disclose relevant updates in a timely manner. Investors are advised to be cautious about investment risks.

5. Documents for reference

6. Notice of Defense from the Supreme People’s Court of China.

This announcement is made accordingly.

Board of Directors

Tibet Gaozheng Minbao Co., Ltd.

March 19, 2026