[ECS] Announcement of Board Election of Chairman

1. Date of board resolution or change: 2026/05/27 2. Position (Chairman or General Manager): Chairman 3. Name of outgoing person: Zhang Ronghua (Representative of Tatung Co., Ltd.) 4. Profile of outgoing person: Chairman of the Company 5. Name of incoming person: Zhang Ronghua (Representative of Tatung Co., Ltd.) 6. Profile of incoming person: Chairman of the Company 7. Reason for change (Resignation, Removal, Expiration of term, Job adjustment, Layoff, Retirement, Death, or New appointment): Expiration of term 8. Reason for change: Re-election upon expiration of term 9. Effective date of new appointment: 2026/05/27 10. Other matters (If the subject of the event or resolution is a publicly issued company or above, this material information also meets the requirements of Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act regarding matters that have a significant impact on shareholder equity or securities prices): None.