[China Steel Structure] Announcement of Chairman's reappointment

1. Date of board resolution or change: 115/05/28. 2. Personnel category: Chairman. 3. Name of former holder: Chen Rui-teng. 4. Resume of former holder: Chairman of the company. 5. Name of new holder: Chen Rui-teng. 6. Resume of new holder: Chairman of the company. 7. Status of change: Expiration of term. 8. Reason for change: Re-election of the board on May 28, 2026, and subsequent re-election of the Chairman by the new board. 9. Effective date of new appointment: 115/05/28. 10. Other matters: None.