[Tah Tong] The company changes its CPA in coordination with the internal rotation of the accounting firm.

1. Date of board of directors resolution (Date of occurrence): 2026/04/22 2. Name of previous accounting firm: PricewaterhouseCoopers (PwC) Taiwan 3. Name of previous certifying CPA 1: Lin Ya-Hui 4. Name of previous certifying CPA 2: Lin Yong-Zhi 5. Name of new accounting firm: PricewaterhouseCoopers (PwC) Taiwan 6. Name of new certifying CPA 1: Hu Zhi-Hua 7. Name of new certifying CPA 2: Lin Yong-Zhi 8. Reason for changing CPAs: Internal adjustment within the accounting firm 9. Explain whether the company proactively terminated the appointment, decided not to continue the appointment, or if the previous CPA proactively terminated or declined the appointment: Not applicable 10. Date the company notified or received notice of termination: 2026/04/07 11. Whether the financial reports for the most recent two years filed or to be prepared had been adjusted by the CPA or if there were suggestions for major improvements in internal control: None 12. Whether the company had any dissenting opinions on the above adjustments or suggestions (if yes, detail the nature of each item, the company's original processing method, final outcome, and the successor CPA's written opinion): None 13. Prior to formally appointing the successor CPA, whether the company consulted them regarding the previous CPA's adjustments, suggestions, and potential audit opinions (if yes, input the inquiry and result): Not applicable 14. Explain whether the previous CPA was authorized to fully answer reasonable inquiries from the successor CPA (including the aforementioned disagreements): Not applicable 15. Other matters to be specified (if the subject of the event or resolution is a public company or above, and the material information also meets the criteria of Article 7, Paragraph 7 of the Securities and Exchange Act Enforcement Rules regarding significant impacts on shareholder equity or securities prices): None