Announcement Regarding Change of Audit Committee Member

1. Date of occurrence: 2026/05/25 2. Name of functional committee: Audit Committee 3. Name of predecessor: Not applicable 4. Resume of predecessor: Not applicable 5. Name of successor: Zeng Xiang-qi 6. Resume of successor: Professor, Department of Physics, Chung Yuan Christian University 7. Type of change (e.g., resignation, dismissal, expiration of term, death, or new appointment): New appointment 8. Reason for change: By-election of an independent director at the shareholders' meeting 9. Original term of office: 2025/05/28 ~ 2028/05/27 10. Effective date of new appointment: 2026/05/25 11. Other notes: None