Dean Diagnostics: Announcement of Resolutions of the Fifteenth Meeting of the Fifth Board of Directors

Securities code: 300244 Securities abbreviation: Dean Diagnostics Announcement number: 2025-034

Dean Diagnostic Technology Group Co., Ltd.

Announcement of Resolutions of the Fifteenth Meeting of the Fifth Board of Directors

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

At 10:00 on October 13, 2025, Dean Diagnostic Technology Group Co., Ltd. (hereinafter referred to as the "Company" or "Dean Diagnostics") held the 15th meeting of the fifth board of directors by communication voting. Notice of the convening of this meeting has been notified to all directors by text message, email, etc. on October 10, 2025. The meeting was convened and chaired by Mr. Chen Haibin, chairman of the company. There were 8 directors who should participate in voting at this meeting, and 8 directors actually participated in voting, which complied with the relevant provisions of the Company Law, Securities Law and Articles of Association. The meeting passed the following resolution:

1. Review of the "Proposal on the Appointment of the Company's Securities Affairs Representative"

Due to the company's internal position adjustment, Mr. Zhu Disheng no longer serves as the company's securities affairs representative. In accordance with relevant regulations such as the Company Law, Shenzhen Stock Exchange Self-Regulatory Guidelines for Listed Companies No. 1 - Business Management, Articles of Association, and Working Rules of the Board Secretary, in order to ensure the smooth conduct of the work of the Board of Directors, the company plans to appoint Ms. Fang Meng as the company’s new securities affairs representative, with a term starting from the date of review and approval at this Board meeting to the expiration date of the fifth Board of Directors. For details, please refer to the "Announcement on Change of Securities Affairs Representative" disclosed by the company on cninfo.com on the same day.

Voting results: 8 votes in favor, 0 votes against, and 0 abstentions.

Announcement is hereby made.

Dean Diagnostic Technology Group Co., Ltd. Board of Directors

October 13, 2025