[Tongtai] Announcement on the election of new Chairman and change of General Manager by important subsidiary APEX Elite Co., Ltd.

1. Date of board resolution or occurrence of change: 2026/05/13 2. Personnel type (please enter Chairman or General Manager): Chairman, General Manager 3. Name of former occupant: Yen, Jui-Hsiung 4. Brief resume of former occupant: Chairman of Tongtai Machine & Tool Co., Ltd. 5. Name of new occupant: Chairman: Fan, Hsin General Manager: Chang, Chih-Wei 6. Brief resume of new occupant: Chairman: Fan, Hsin, Director of Tongtai Machine & Tool Co., Ltd. General Manager: Chang, Chih-Wei, Vice President of APEX Elite Co., Ltd. 7. Nature of change (please enter "resignation", "dismissal", "expiration of term", "job adjustment", "layoff", "retirement", "death" or "new appointment"): Early re-election, job adjustment 8. Reason for change: Early re-election, job adjustment 9. Effective date of new appointment: 2026/05/13 10. Other matters that need to be specified (If the subject of the event or resolution is a public company or above, this material information simultaneously complies with Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act regarding matters that have a material impact on shareholders' equity or securities prices): None Keywords: Material Information