GuanDian Defense Technology Co., Ltd. Announcement Regarding the Company’s Receipt of the China Securities Regulatory Commission’s “Filing & Investigation Notice”

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Stock code: 688287 Stock abbreviation: *ST Guandian Announcement No.: 2026-020

Guandian Defense Technology Co., Ltd.

Announcement on the Company’s Receipt of the 《Filing Notice》 issued by the China Securities Regulatory Commission

This company’s board of directors and all directors warrant that the contents of this announcement contain no false records, misleading statements, or material omissions, and they bear legal responsibility under the law for the truthfulness, accuracy, and completeness of the contents of this announcement.

Guandian Defense Technology Co., Ltd. (hereinafter referred to as the “Company”) received on April 3, 2026 the 《Filing Notice》 (Number: Zhen-Jian Filing Zi 0142026009) issued by the China Securities Regulatory Commission (hereinafter referred to as the “CSRC”) to the Company. The CSRC has decided to file a case for the Company, as the Company is suspected of violations of laws and regulations regarding information disclosure, among others, in accordance with laws and regulations including the 《Securities Law of the People’s Republic of China》 and the 《Administrative Penalty Law of the People’s Republic of China》.

During the filing investigation period, the Company will actively cooperate with the CSRC’s related investigation work and strictly fulfill its information disclosure obligations in a timely manner in accordance with regulatory requirements.

The Company has designated the information disclosure media as 《China Securities Journal》《Shanghai Securities News》《Securities Times》《Securities Daily》《and the website of the Shanghai Stock Exchange (www.sse.com.cn)》. All relevant information of the Company shall be subject to announcements disclosed on the above designated media. Investors are kindly requested to make rational investments and be mindful of investment risks.

This announcement is hereby issued.

Board of Directors of Guandian Defense Technology Co., Ltd.

April 4, 2026

Stock code: 688287 Stock abbreviation: *ST Guandian Announcement No.: 2026-021

Guandian Defense Technology Co., Ltd.

Announcement on the Sixth Risk Warning of the Possible Delisting of the Company’s Stock

This company’s board of directors and all directors warrant that the contents of this announcement contain no false records, misleading statements, or material omissions, and they bear legal responsibility under the law for the truthfulness, accuracy, and completeness of the contents of this announcement.

Key Matters to Note:

● Guandian Defense Technology Co., Ltd. (hereinafter referred to as the “Company”) disclosed on April 29, 2025 the 《Announcement on the Implementation of Delisting Risk Warning and the Addition of Other Risk Warnings and the Suspension of Trading of the Company’s Stock》 (Announcement No.: 2025-020). Due to the fact that, for fiscal year 2024, the lower of the total profit audited and the net profit after deducting non-recurring gains and losses was negative, and that the operating revenue after deducting business income not related to the main business and income that lacks commercial substance was below RMB 100 million, in accordance with the 《Shanghai Stock Exchange STAR Market Stock Listing Rules (as amended in April 2025)》 (hereinafter referred to as the “《Listing Rules》”), the Company’s stock was placed under delisting risk warning from April 30, 2025.

● The Company has received today the 《Filing Notice》 issued by the China Securities Regulatory Commission (hereinafter referred to as the “CSRC”) (Zhen-Jian Filing Zi 0142026009). The CSRC has decided to file a case for the Company due to suspected violations of laws and regulations regarding information disclosure, among others, in accordance with laws and regulations including the 《Securities Law of the People’s Republic of China》 and the 《Administrative Penalty Law of the People’s Republic of China》. Investors are kindly requested to be mindful of investment risks.

● Zhongxi Certified Public Accountants (Special General Partnership) (hereinafter referred to as “Zhongxi Certified Public Accountants”) has issued a special statement on the progress of the audit of the Company’s 2025 annual report. After Zhongxi Certified Public Accountants’ preliminary review, as of the date when the special statement is issued, Zhongxi Certified Public Accountants is orderly carrying out the corresponding audit procedures, obtaining audit evidence, and compiling and reviewing audit workpapers. The related audit work has not yet been fully completed. Based on the current situation, it is preliminarily expected that it will be unable to issue an audit report with an unmodified opinion on the Company’s 2025 financial statements and their notes. The specific audit opinion shall be subject to the audit report issued by Zhongxi Certified Public Accountants on the Company’s 2025 financial statements. If the Company’s 2025 financial statements are issued with an audit opinion other than an unmodified opinion, the Company’s stock will be delisted by the Shanghai Stock Exchange.

Since the Company’s audit work for fiscal year 2025 has not yet been completed, the operating revenue after deducting business income not related to the main business and income that lacks commercial substance in this current estimate has uncertainty. There remains the risk that the operating revenue after deducting business income not related to the main business and income that lacks commercial substance is below RMB 100 million and that the total profit and net profit (whichever is lower before and after deducting non-recurring gains and losses) are negative, thereby triggering financial-type delisting standards.

If the Company experiences circumstances as specified in Articles 12.4.10 and 12.4.14 of the 《Listing Rules》, the Company’s stock may be delisted by the Shanghai Stock Exchange. Investors are kindly requested to be mindful of investment risks.

I. Reasons for possible delisting

On April 29, 2025, the Company disclosed the 《Announcement on the Implementation of Delisting Risk Warning and the Addition of Other Risk Warnings and the Suspension of Trading of the Company’s Stock》 (Announcement No.: 2025-020). Due to the fact that, for fiscal year 2024, the lower of the total profit audited and the net profit after deducting non-recurring gains and losses was negative, and that the operating revenue after deducting business income not related to the main business and income that lacks commercial substance was below RMB 100 million, in accordance with the relevant provisions of the 《Listing Rules》, the Company’s stock has been placed under delisting risk warning from April 30, 2025.

According to the provisions of Article 12.4.10 of the 《Listing Rules》: “After a listed company’s stock is placed under delisting risk warning pursuant to Article 12.4.2, if no circumstances listed below have occurred in the most recent accounting year, within five trading days after the annual report is disclosed, the company may apply to this Exchange to withdraw the delisting risk warning applied to its stock and disclose the following:

(i) Any of the circumstances set forth in items 1 to 3 of the first paragraph of Article 12.4.2;

(ii) The annual financial and accounting reports are issued with an audit report with a modified opinion maintaining reservation;

(iii) Audit reports are issued stating that the internal control over financial reporting cannot express an opinion or that the opinion is adverse, or no audit report on internal control over financial reporting is disclosed in accordance with relevant provisions; however, the exclusion is that due to bankruptcy reorganization, a restructuring listing, or a major asset reorganization, the company is unable to disclose an audit report on internal control over financial reporting in accordance with relevant provisions;

(iv) The annual report is not disclosed within the statutory period;

(v) A majority of directors are unable to guarantee the truthfulness, accuracy, and completeness of the annual report disclosed by the company, and the company fails to rectify within the statutory period.”

If the Company does not meet the conditions for withdrawing the delisting risk warning under this article or does not apply to withdraw the delisting risk warning within the prescribed period, the Company’s stock will face the risk of being delisted.

II. Disclosure status of previously issued delisting risk warning announcements

In accordance with the 《Listing Rules》 and the 《Self-Regulatory Guidance for STAR Market Listed Companies No. 12—Information Disclosure by Delisting Risk Companies》, financial-type delisting risk companies shall, within one month after the end of the accounting year in which their stock is placed under delisting risk warning, disclose a risk warning announcement stating that their stock may be delisted, and from the disclosure date of the first risk warning announcement until the disclosure date of the annual report, disclose a risk warning announcement once every 10 trading days.

The Company disclosed on January 29, 2026 the 《Risk Warning Announcement on the Company’s Stock Possibly Being Delisted》 (Announcement No.: 2026-009).

The Company disclosed on February 12, 2026 the 《Second Risk Warning Announcement on the Company’s Stock Possibly Being Delisted》 (Announcement No.: 2026-012).

The Company disclosed on February 28, 2026 the 《Third Risk Warning Announcement on the Company’s Stock Possibly Being Delisted》 (Announcement No.: 2026-014).

The Company disclosed on March 6, 2026 the 《Fourth Risk Warning Announcement on the Company’s Stock Possibly Being Delisted》 (Announcement No.: 2026-016).

The Company disclosed on March 20, 2026 the 《Fifth Risk Warning Announcement on the Company’s Stock Possibly Being Delisted》 (Announcement No.: 2026-017).

III. Other matters

1. Zhongxi Certified Public Accountants issued a special statement on the progress of the audit work for the Company’s 2025 annual report. After Zhongxi Certified Public Accountants’ preliminary review, as of the date when the special statement is issued, Zhongxi Certified Public Accountants is orderly carrying out the corresponding audit procedures, obtaining audit evidence, and compiling and reviewing audit workpapers. The related audit work has not yet been fully completed. For specific details, please refer to the 《Special Statement of Zhongxi Certified Public Accountants (Special General Partnership) on the Progress of the Audit Work for Guandian Defense Technology Co., Ltd.’s 2025 Annual Report》 disclosed by the Company on March 27, 2026. Based on the current situation, it is preliminarily expected that it will be unable to issue an audit report with an unmodified opinion on the Company’s 2025 financial statements and their notes. The specific audit opinion shall be subject to the audit report issued by Zhongxi Certified Public Accountants on the Company’s 2025 financial statements. If the Company’s 2025 financial statements are issued with an audit opinion other than an unmodified opinion, the Company’s stock will be delisted by the Shanghai Stock Exchange.

2. On February 28, 2026, the Company disclosed the 《2025 Annual Performance Express Report》 (Announcement No.: 2026-013) on the website of the Shanghai Stock Exchange (www.sse.com.cn). According to the preliminary calculations by the finance department, it is expected that for 2025 the Company’s total profit will be -213.09M yuan, that the Company’s net profit attributable to owners of the parent company will be -213.91M yuan, and that the net profit attributable to owners of the parent company after deducting non-recurring gains and losses will be -206.32M yuan. Compared with the same period of the previous year (statutory disclosed figures), losses are expected to widen. It is expected that the Company’s operating revenue for 2025 will be 123.67M yuan; the operating revenue after deducting business income not related to the main business and income that lacks commercial substance will be 123.67M yuan; and that the Company’s net assets at the end of 2025 will be 624.9M yuan. The above express-report data are only preliminary accounting figures, have not been audited by certified public accountants, and the specific and accurate financial data shall be based on the audited 2025 annual report to be officially disclosed by the Company.

Since the Company’s audit work for fiscal year 2025 has not yet been completed, the operating revenue after deducting business income not related to the main business and income that lacks commercial substance in this current estimate has uncertainty. There remains the risk that the operating revenue after deducting business income not related to the main business and income that lacks commercial substance is below RMB 100 million and that the total profit and net profit (whichever is lower before and after deducting non-recurring gains and losses) are negative, thereby triggering financial-type delisting standards. In addition, if the Company experiences circumstances as specified in Articles 12.4.10 and 12.4.14 of the 《Listing Rules》, the Company’s stock may be delisted by the Shanghai Stock Exchange.

The Company has designated the information disclosure media and website as 《Shanghai Securities News》《China Securities Journal》《Securities Daily》《Securities Times》 and the Shanghai Stock Exchange website (www.sse.com.cn). All information of the Company shall be subject to the information disclosed on the above designated media and website. Investors are kindly requested to be mindful of investment risks.

This announcement is hereby issued.

Board of Directors of Guandian Defense Technology Co., Ltd.

April 4, 2026

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