ST8: Change in personnel

Sieu Thanh Joint Stock Corporation announces the change in personnel as follows: Resignation: Mr. Pham Vinh Phu - Resigned position: Chief Executive Officer - Effective date: January 31, 2023. 2. Mr. Dinh Thi Hong Van - Resigned position: Deputy Chief Executive Officer, Chief Accountant and Authorized person for information disclosure. - Effective date: January 31, 2023. 3. Mr. David Cam Hao Ong - Resigned position: Member of BOD, Deputy Chief Executive Officer - Effective date: January 31, 2023. Appointment: Mr. Nguyen Van Dai - Appointed position: Chief Executive Officer Authorized person for information disclosure Legal Representative - Effective date: January 31, 2023. 2. Mrs. Tran Thi Kim Loan - Appointed position: Chief Accountant - Effective date: January 31, 2023.