[SUNJAC] Announcement of Board of Directors' Resolution to Appoint Chairman

1. Date of Board of Directors' resolution or date of change: 2026/05/20 2. Position: Chairman 3. Name of predecessor: Sun Ching-yuan 4. Background of predecessor: Chairman of the Company 5. Name of successor: Sun Ching-yuan 6. Background of successor: Chairman of the Company 7. Type of change: Expiration of term 8. Reason for change: Re-elected by the 21st Board of Directors upon expiration of the former term. 9. Effective date of appointment: 2026/05/20 10. Other matters: None.