-- Announcement on the Death of Director and Deputy General Manager

Securities code: 688399 Securities abbreviation: Shuoshi Biotechnology Announcement number: 2025-033

Jiangsu Shuoshi Biotechnology Co., Ltd.

Announcement on the death of the company’s director and deputy general manager

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.

Jiangsu Shuoshi Biotechnology Co., Ltd. (hereinafter referred to as the "Company") sadly announces that Mr. Liu Zhonghua, the company's director and deputy general manager, unfortunately passed away on the morning of September 12, 2025 due to a sudden illness. The company and all employees express their deep condolences and extend sincere condolences to his family.

Mr. Liu Zhonghua always adheres to the belief of serving the country through industry, actively fulfills social responsibilities, and devotes his life to the research and development of infectious disease detection, tumor screening and maternal and child health-related diagnostic products. He has won many honors such as Outstanding Communist Party Member of Jiangsu Province, Advanced Individual in COVID-19 Prevention and Control in Jiangsu Province, and National Model Worker. As one of the core founders of the company, he has been dedicated to his duties and dedication for many years and made an indelible contribution to the founding and growth of the company. During his tenure as the company's director and deputy general manager, he was diligent and pragmatic, performed his duties conscientiously, and played an important role in promoting the company's development. The company and all employees would like to express their high respect and heartfelt thanks to Mr. Liu Zhonghua.

As of the disclosure date of this announcement, Mr. Liu Zhonghua directly holds 2,152,512 shares of the company's shares, accounting for 2.57% of the company's total share capital. The shares held by it will go through follow-up procedures in accordance with relevant laws and regulations.

After the death of Mr. Liu Zhonghua, the current number of board members of the company has changed from 9 to 8, which is not less than the quorum and does not affect the normal operation of the company's board of directors, but is less than the number of board members stipulated in the "Articles of Association". The company will complete the by-election of directors as soon as possible in accordance with the provisions of the "Company Law of the People's Republic of China" and the "Articles of Association" and in accordance with relevant legal procedures, and perform information disclosure obligations in a timely manner.

Announcement is hereby made.

Board of Directors of Jiangsu Shuoshi Biotechnology Co., Ltd.

September 13, 2025