Tailin Biotech: Announcement on Obtaining Patent Certificate

Securities code: 300813 Securities abbreviation: Tailin Biotechnology Announcement number: 2026-037

Zhejiang Tailin Biotechnology Co., Ltd.

Announcement on Obtaining Patent Certificate

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.

Zhejiang Tailin Biotechnology Co., Ltd. (hereinafter referred to as the "Company") wholly-owned subsidiaries Zhejiang Tailin Medical Engineering Co., Ltd. (hereinafter referred to as "Tailin Medical Engineering"), Zhejiang Tailin Life Sciences Co., Ltd. (hereinafter referred to as "Tailin Life Sciences"), and Zhejiang Tailin Analytical Instruments Co., Ltd. (hereinafter referred to as "Tailin Analytical Instruments") have recently obtained a total of 5 patent certificates (including 2 invention patents). The details are as follows: Serial number Patent name Patent type Application number Authorization announcement date Patentee 1 A tabletop pre-filled needle vacuum stopper Invention 2022106125804 2026/5/1 Tailin Medical Engineering A low-temperature vaporization generator for hydrogen peroxide and

2 Invention 2022107859951 2026/5/1 Tailin Medical Engineering Vaporized Hydrogen Peroxide Sterilization System

3 A soft pack isolator sterilization device Utility model 202520409901X 2026/5/5 Tailin Medical Engineering Pressure balance of a hollow fiber filter

4 Utility Model 2025210300504 2026/4/24 Tailin Life Science Device

5 Inorganic carbon removal device Appearance 2025305106459 2026/5/1 Tailin Analytical Instrument

The acquisition of the above patents will not have a significant impact on the recent production and operation of the company and its wholly-owned subsidiaries Tailin Medical Engineering, Tailin Life Sciences, and Tailin Analytical Instruments, but it will help the company and its wholly-owned subsidiaries Tailin Medical Engineering, Tailin Life Sciences, and Tailin Analytical Instruments further improve the intellectual property protection system, give full play to the advantages of independent intellectual property rights, and form a continuous innovation mechanism to maintain technological leadership and enhance core competitiveness.

Announcement is hereby made.

Board of Directors of Zhejiang Tailin Biotechnology Co., Ltd.

May 11, 2026