[Taichung Bank] Announcement of Change in the Company's Chief Information Security Officer

1. Type of personnel change (please enter Spokesperson, Acting Spokesperson, Important Operational Executive (e.g., CEO, COO, CMO, CSO), Financial Executive, Accounting Executive, Corporate Governance Officer, Chief Information Security Officer, R&D Executive, Internal Audit Executive, or Agent for Litigation/Non-litigation): Chief Information Security Officer 2. Date of change: 2026/05/07 3. Name, title, and brief resume of the former incumbent: Lin Jian-Hong, Vice President of Taichung Commercial Bank Co., Ltd. 4. Name, title, and brief resume of the new incumbent: Yang Gui-Hua, Senior Vice President of Taichung Commercial Bank Co., Ltd. 5. Type of change (please enter "Resignation", "Job Reassignment", "Layoff", "Retirement", "Death", "New Appointment", or "Dismissal"): Job Reassignment 6. Reason for change: Job Reassignment 7. Effective date: 2026/05/14 8. Other matters that should be specified: None