【ETTV】Supplementary Announcement by Donglin Assets Corporation on Lease-and-Build Engineering Contract

1. Type of Contract: Engineering Contract 2. Date of Event: May 23, 2025 ~ May 23, 2025 3. Board Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Approved by Chairman Date: May 23, 2025 (Minguo Year 114) 5. Counterparty and Relationship with the Company: Counterparty: Lifu Industrial Co., Ltd. Relationship with Company: None 6. Main Contract Contents (including total contract amount, estimated investment amount, contract start and end dates, restrictive clauses, and other important agreements): Signed Engineering Contract and Curtain Wall Material Procurement Contract for the construction of the ETTV Group Global Operations Headquarters in Linkou with Lifu Industrial Co., Ltd. 1. Exterior Curtain Wall Work (Building B): NT$50.24 million 2. Exterior Curtain Wall Materials (Building B): NT$577.76 million Total Contract Value: NT$628 million 7. Name of Professional Appraisal Firm or Company and Appraisal Result: Not applicable 8. Name of Real Estate Appraiser: Not applicable 9. License Number of Real Estate Appraiser: Not applicable 10. Specific Purpose of Acquisition: Construction of Group Headquarters 11. Dissenting Director Opinions on the Transaction: None 12. Is this a Related-Party Transaction: No 13. Date of Supervisor Approval or Audit Committee Consent: Not applicable 14. Is the Appraisal Report a Limited Price, Specific Price, or Special Price: No or Not applicable 15. Has the Appraisal Report Not Yet Been Obtained: No or Not applicable 16. Reason for Not Yet Obtaining the Appraisal Report: Not applicable 17. Reasons for Significant Differences in Appraisal Results and Auditor's Opinion: Not applicable 18. Name of Accounting Firm: Not applicable 19. Name of Auditor: Not applicable 20. Auditor's License Number: Not applicable 21. Previous Date of Material Information Disclosure on the Same Event: Not applicable 22. Other Explanatory Matters: None