【Taiwan High Speed Rail】Announcement of the Company's 'New Subcontract for Long-Lead-Time Spare Parts in High Speed Rail Train Set Procurement Project (Hitachi)'

1. Name and nature of the subject matter (e.g., land parcel XX, section XX, subdivision XX in Beiqu, Taichung City): New subcontract for long-lead-time spare parts in High Speed Rail train set procurement project (Hitachi) 2. Date of occurrence of the event: 2026/5/6~2026/5/6 3. Date of board of directors' resolution: May 6, 2026 4. Other approval dates: Not applicable 5. Quantity of transaction units (e.g., XX square meters, equivalent to XX pings), unit price, and total transaction amount: (1) Quantity of transaction units: Not applicable (2) Unit price: Not applicable (3) Total transaction amount: Approximately NTD 1,032,036,915 (including tax) 6. Counterparty to the transaction and its relationship with the company (if the counterparty is a natural person and not a related party of the company, their name may be omitted): Hitachi, Ltd.; not a related party of the company 7. If the counterparty is a related party, the reasons for selecting the related party as the transaction object and the previous transferor, the relationship between the previous transferor and the company and the counterparty, the previous transfer date, and transfer amount shall also be announced: Not applicable 8. If the ownership of the transaction object has been a related party of the company within the past five years, the date and price of acquisition and disposal by the related party and the relationship with the company at the time of the transaction shall also be announced: Not applicable 9. Estimated disposal gain (or loss) (not applicable for asset acquisition) (for deferred items, a table explaining recognition shall be provided): Not applicable 10. Delivery or payment terms (including payment period and amount), contract restriction clauses, and other important agreements: Delivery or payment terms: As stipulated in the contract; contract restriction clauses and other important agreements: None. 11. Method of determining this transaction (e.g., tender, price comparison, or negotiation), reference basis for price determination, and decision-making unit: Executing inquiry and negotiation according to internal operating procedures; decision-making unit: Board of Directors 12. Name of professional appraiser firm or company and appraisal amount: Not applicable 13. Name of professional appraiser: Not applicable 14. Professional appraiser's license number: Not applicable 15. Whether the appraisal report is a limited price, specific price, or special price: No or not applicable 16. Whether the appraisal report has not yet been obtained: No or not applicable 17. Reason for not yet obtaining the appraisal report: Not applicable 18. If there is a significant difference in the appraisal results, the reason for the difference and the CPA's opinion: Not applicable 19. Name of accounting firm: Not applicable 20. Name of CPA: Not applicable 21. CPA's license number: Not applicable 22. Broker and brokerage fees: Not applicable 23. Specific purpose or use of acquisition or disposal: To execute and connect inspection operations, new long-lead-time spare parts for High Speed Rail train set procurement project 24. Opinions of directors who dissented from this transaction: None 25. Is this transaction a related party transaction: No 26. Date of approval by supervisors or audit committee: May 5, 2026 27. Is this transaction for acquiring real estate or its right-of-use asset from a related party: No 28. Price assessed according to Article 16 of the 'Regulations Governing the Acquisition or Disposal of Assets by Public Companies': Not applicable 29. If the price assessed in the preceding item is lower than the transaction price, the price assessed according to Article 17 of the same regulations: Not applicable 30. Date of previous material information announcement on the same event: Not applicable 31. Other matters to be specified: Approved by the 40th meeting of the 10th Board of Directors on May 6, 2026. Keywords: Material Information