3SBIO INC. 三生制药 (Incorporated in the Cayman Islands with limited liability) （於開曼群島註冊成立的有限責任公司） (Stock Code 股份代號: 01530) Dear non-registered shareholder(s), 30 April 2025 Reminder letter regarding the Arrangement of Electronic Dissemination of Corporate Communications With reference to the notification letter dated 6 March 2024 titled "Arrangement of Electronic Dissemination of Corporate Communications", 3SBio Inc. (the "Company") is writing to remind you that the Company has adopted electronic dissemination ...