[CPDC] Announcement of Change in Auditing Firm and Certified Public Accountants

1. Date of Board Approval: 2026/04/24 2. Name of Former Accounting Firm: KPMG (安侯建業聯合會計師事務所) 3. Name of Former CPA 1: Wu Cheng-yen 4. Name of Former CPA 2: Li Feng-hui 5. Name of New Accounting Firm: ShineWing (信永中和聯合會計師事務所) 6. Name of New CPA 1: Chen Kuang-hui 7. Name of New CPA 2: Yang Tzu-sheng 8. Reason for Change: To coordinate with organizational streamlining, save management costs, and enhance operational efficiency. 9. Statement of Termination: Initiated by the company. 10. Date of Notification: 2026/04/24 11. Previous Adjustments or Internal Control Issues: None. 12. Disagreements with Adjustments: Not applicable. 13. Consultation with New CPA before Appointment: Not applicable. 14. Authorization for Former CPA to Respond to New CPA: Yes. 15. Other Disclosures: Starting from Q1 2026, the company's financial reports will be audited by the new firm.