Announcement of Qingdao Weilan Biotechnology Co., Ltd. on the resignation of the securities affairs representative

Securities code: 603739 Securities abbreviation: Weilan Biotechnology Announcement number: 2026-006 Qingdao Weilan Biotechnology Co., Ltd.

Announcement on the resignation of the securities affairs representative

The company's board of directors and all directors guarantee that the contents of this announcement do not contain any false records, misleading statements or major omissions, and assume legal responsibility for the authenticity, accuracy and completeness of its contents.

The board of directors of Qingdao Weilan Biological Co., Ltd. (hereinafter referred to as the "Company") recently received a written resignation report submitted by the securities affairs representative Mr. You Shujun. Mr. You Shujun applied to resign from the company's securities affairs representative due to personal reasons. The resignation report will be effective from the date it is delivered to the company's board of directors.

Mr. You Shujun will no longer hold any position in the company after his resignation. As of the disclosure date of this announcement, the work responsible for Mr. You Shujun has been handed over, and his resignation will not affect the development of relevant work of the company.

The company's board of directors will appoint qualified personnel as securities affairs representatives as soon as possible in accordance with the "Shanghai Stock Exchange Stock Listing Rules" and other relevant regulations to assist the company's board secretary in carrying out relevant work.

Announcement is hereby made.

Board of Directors of Qingdao Weilan Biological Co., Ltd.

February 11, 2026