Jiantong Announces Change in R&D Management

1. Position affected (please specify: spokesperson, acting spokesperson, key operational executives such as CEO, COO, CMO, CSO, financial officer, accounting officer, corporate governance officer, CISO, R&D head, internal audit head, litigation or non-litigation agent): R&D Manager

2. Date of change: July 6, 2026 (Minguo Year 115)

3. Former appointee's name, title, and resume: Yilin He, General Manager and R&D Manager of Jiantong Precision Industry Co., Ltd.

4. New appointee's name, title, and resume: Yumin Lin, Deputy General Manager of Jiantong Precision Industry Co., Ltd.

5. Nature of change (please enter 'resignation', 'job reassignment', 'layoff', 'retirement', 'death', 'new appointment', or 'dismissal'): Retirement

6. Reason for change: Retirement of the R&D Manager

7. Effective date: July 6, 2026 (Minguo Year 115)

8. Other disclosures: None.