Song Chuan Precision (7788) Announces Change of Supervisor for Major Subsidiary

Announcement Date: May 21, 115 (2026) Company Code: 7788 Company Name: Song Chuan Precision Subject: Announcement of the change of supervisor for major subsidiary Yi Sheng Investment Co., Ltd. 1. Change Date: 05/21/115 2. Classification of Personnel: Corporate Supervisor 3. Predecessor: Taiwan Hong Ding Asia II Limited Partnership (Representative: Liu Ching-yi) 4. Previous Position: Supervisor at Yi Sheng Investment Co., Ltd. 5. Successor: Not applicable 6. Reason for Change: Resignation 7. Reason for Change Details: Resignation of corporate supervisor and its legal representative. 8. Other notes: The turnover rate of supervisors for the current term is 100%. This does not meet the criteria for a change in more than one-third of the board of directors.