Tsann Kuen: Announcement Regarding Personnel Change of Corporate Governance Officer and Deputy Spokesperson

1. Type of personnel change: Corporate Governance Officer, Deputy Spokesperson 2. Date of change: May 8, 2026 (ROC Year 115/05/08) 3. Former incumbent's name, title, and brief resume: Corporate Governance Officer, Deputy Spokesperson: Chen Xing-yu, Assistant Manager, Assistant Manager of the Accounting Department of this company. 4. New incumbent's name, title, and brief resume: Corporate Governance Officer: Zheng Jin-ying, Assistant Manager, Assistant Manager of the Sustainable Development Department of this company. Deputy Spokesperson: Vacant. 5. Type of change: Resignation 6. Reason for change: The former Corporate Governance Officer and Deputy Spokesperson resigned due to personal career planning. 7. Effective date: May 8, 2026 (ROC Year 115/05/08) 8. Other matters to be stated: None.