Xidiwei Electronics Group Co., Ltd. Announces the Results of Share Reduction by Shareholders Holding Over 5%

Stock Code: 688173 Stock Short Name: XIDWEI Announcement No.: 2026-033

XIDWEI Electronic Group Co., Ltd.

Results Announcement on Share Reduction by a Shareholder Holding More Than 5%

This company’s board of directors, all directors, and relevant shareholders warrant that the contents of this announcement contain no false statements, misleading representations, or material omissions, and they shall be legally responsible for the truthfulness, accuracy, and completeness of the contents thereof.

Key Highlights:

● Basic information on the large shareholder’s holdings

Before the implementation of this share reduction plan, XIDWEI Electronic Group Co., Ltd. (hereinafter referred to as the “Company”) shareholder Chongqing Weichun Enterprise Management Consulting Co., Ltd. (hereinafter referred to as “Chongqing Weichun”) held 29,846,925 shares of the Company, accounting for 7.24% of the Company’s total share capital. All of the above shares were obtained before the Company’s initial public offering, and have all had their lock-up periods lifted.

● Implementation results of the share reduction plan

On December 6, 2025, the Company disclosed the “Share Reduction Plan Announcement by Shareholders Holding More Than 5% of the Shares of XIDWEI Electronic Group Co., Ltd.” (Announcement No. 2025-101). Chongqing Weichun intended to reduce its holdings of the Company’s shares by an aggregate amount not exceeding 12,369,421 shares through centralized competitive bidding and block trades, representing an aggregate reduction ratio not exceeding 3.00% of the Company’s total share capital. The reduction period was within 3 months after 15 trading days from the date of disclosure of this share reduction plan announcement. Specifically, the reduction via centralized competitive bidding would not exceed 4,123,140 shares, representing an aggregate reduction ratio not exceeding 1.00%; the reduction via block trades would not exceed 8,246,281 shares, representing an aggregate reduction ratio not exceeding 2.00%.

On March 30, 2026, the Company received a “Notice Letter on the Results of the Reduction of Shares Held in XIDWEI Electronic Group Co., Ltd.” issued by Chongqing Weichun. As of March 28, 2026, the share reduction time window under this share reduction plan had expired. Chongqing Weichun reduced its holdings of the Company’s shares in total by 5,895,349 shares, accounting for 1.43% of the Company’s total share capital. Among this, the shares reduced via centralized competitive bidding totaled 2,388,349 shares, accounting for 0.58% of the Company’s total share capital; shares reduced via block trades totaled 3,507,000 shares, accounting for 0.85% of the Company’s total share capital. In addition, due to the Company’s independent exercise of stock options under the 2024 stock option incentive plan, between December 4, 2025 and March 27, 2026, the Company’s total share capital changed from 412,314,050 shares to 413,036,911 shares, resulting in a passive dilution ratio of 0.01% for the shares held by Chongqing Weichun.

I. Basic information of the reducing entity prior to the reduction

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Note: The “shareholding proportion” in the table above is calculated based on the Company’s total share capital of 412,314,050 shares as of December 4, 2025, prior to the disclosure of this share reduction plan announcement.

The above reducing entity has no parties acting in concert.

II. Results of implementation of the share reduction plan

(I) The large shareholder discloses the implementation results of the share reduction plan due to the following matter:

The disclosed share reduction time window has expired

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Note: 1. The “reduction ratio” and the “current shareholding proportion” in the table above are both calculated based on the Company’s total share capital of 413,036,911 shares as of March 27, 2026;

2. The “original planned reduction ratio” in the table above is calculated based on the Company’s total share capital of 412,314,050 shares as of December 4, 2025 prior to the disclosure of this share reduction plan announcement;

3. Due to the Company’s independent exercise of stock options under the 2024 stock option incentive plan, between December 4, 2025 and March 27, 2026, the Company’s total share capital changed from 412,314,050 shares to 413,036,911 shares, resulting in a passive dilution ratio of 0.01% for the shares held by Chongqing Weichun. The sum of the active reduction ratio by Chongqing Weichun and the share change ratio caused by passive dilution is 1.44%.

(II) Does this share reduction comply with relevant laws and regulations and the business rules of the Shanghai Stock Exchange? √ Yes □ No

(III) Is the actual share reduction consistent with the previously disclosed share reduction plan and commitments? √ Yes □ No

(IV) The share reduction time window has expired; has no reduction been carried out? □ Not carried out √ Carried out

(V) Has the actual share reduction failed to reach the minimum share reduction amount (ratio) specified in the share reduction plan? □ Not reached √ Reached

(VI) Has the share reduction plan been terminated early? □ Yes √ No

(VII) Is there any situation involving a violation of the share reduction plan or other commitments? □ Yes √ No

This announcement is hereby made.

Board of Directors of XIDWEI Electronic Group Co., Ltd.

March 31, 2026

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