Dong Hua Announces Change in CFO, Accounting Officer, and Spokesperson

1. Position Change (Please specify: Spokesperson, Acting Spokesperson, Key Operational Executive, Financial Officer, Accounting Officer, Corporate Governance Officer, CISO, R&D Head, Internal Audit Head, or Legal/Non-Legal Representative): Financial Officer, Accounting Officer, Spokesperson

2. Date of Change: June 30, 2026 (Minguo Year 115)

3. Former Appointee's Name, Title, and Resume: (1) Financial Officer: Yeh Yen-Ling / Assistant Manager, Finance Department (2) Accounting Officer: Yeh Yen-Ling / Assistant Manager, Finance Department (3) Spokesperson: Yeh Yen-Ling / Assistant Manager, Finance Department

4. New Appointee's Name, Title, and Resume: (1) Financial Officer: To be determined (2) Accounting Officer: To be determined (3) Spokesperson: Chiang Chih-Heng / Vice General Manager

5. Nature of Change (e.g., Resignation, Reassignment, Severance, Retirement, Death, New Appointment, Removal): Retirement

6. Reason for Change: Retirement

7. Effective Date: June 30, 2026 (Minguo Year 115)

8. Additional Notes: The appointments of the new Financial Officer and Accounting Officer will be announced separately after selection and formal board approval.