5th Supplementary Agreement of New Generation Rolling Stock(E321/E322)

1.Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): 5th Supplementary
    Agreement  of New Generation Rolling Stock(E321/E322)
2.Date of occurrence of the event: 2026/02/25
3.Date of the board of directors resolution: 2026/02/25
4.Other approval date: Not applicable.
5.Transaction unit amount (e.g.XX square meters, equivalent to XX ping),unit price, and total transaction price: 
   (1) Unit amount: Not applicable
   (2) Unit price: Not applicable
   (3) Total transaction price: approx. NTD 1,344,979,000(Tax inclusive)
6.Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore
    is not a related  party of the Company, the name of the trading counterparty is not required to be disclosed): Hitachi Toshiba
    Supreme Consortium (HTSC),   which is not a related party of THSRC
7.Where the trading counterparty is a related party, announcement shall also be made of the reason for choosing the related
    party as trading counterparty and the identity of the previous owner, its relationship with the Company and the trading
    counterparty, and the previous date and monetary amount of  transfer: Not applicable.
8.Where an owner of the underlying assets within the past five years has been a related party of the Company, the announcement
    shall also include the  date and price of acquisition and disposal by the related party, and its relationship with the Company at the
    time of the transaction: Not applicable.
9.Projected gain (or loss) through disposal (not applicable for acquisition of assets; those with deferral should provide a table
    explaining recognition): Not applicable.
10.Terms of delivery or payment (including payment period and monetary amount), restrictive covenants in the contract,and
      other important terms and conditions: Terms of delivery and payment: to be carried out in accordance with the relevant
      contract; restrictive covenants in the said contracts:  none.
11.The manner of deciding on this transaction (such as invitation to tender, price comparison, or price negotiation), the reference
       basis for the  decision on price, and the decision-making unit:
       (1) The manner of deciding on this transaction and the reference basis for the decision on price: Conducted in accordance with
              THSRC internal procedures  for price inquiry, comparison, and negotiation.
       (2) Decision-making department: Board of Directors.
12.Name of the professional appraisal firm or company and its appraisal price: Not applicable.
13.Name of the professional appraiser: Not applicable.
14.Practice certificate number of the professional appraiser: Not applicable.
15.The appraisal report has a limited price, specific price, or special price: Not applicable.
16.An appraisal report has not yet been obtained: Not applicable.
17.Reason for an appraisal report not being obtained: Not applicable.
18.Reason for any significant discrepancy with the appraisal reports and opinion of the CPA: Not applicable.
19.Name of the CPA firm: Not applicable.
20.Name of the CPA: Not applicable.
21.Practice certificate number of the CPA: Not applicable.
22.Broker and broker's fee: Not applicable.
23.Concrete purpose or use of the acquisition or disposal: Execution of the Test and Commissioning for New Generation Rolling Stock
24.Any dissenting opinions of directors to the present transaction: None.
25.Whether the counterparty of the current transaction is a related party: No
26.Date of ratification by supervisors or approval by the audit committee: 2026/02/23
27.The transaction is to acquire a real property or right-of-use asset from a related party: No
28.The price assessed in accordance with the Article 16 of the Regulations Governing the Acquisition and Disposal of Assets by
      Public Companies: Not applicable.
29.Where the above assessed price is lower than the transaction price, the price assessed in accordance with the Article 17 of
      the same regulations: Not applicable.
30.Date on which material information regarding the same event has been previously released: 2025/11/25.
31.Any other matters that need to be specified: Approved by the 10th Board of Directors at the 36th Board Meeting held Feb.25, 2026.
     The Board of Directors has authorized the Chairman to finalize the signing and effective dates of the contract based on the
     consensus  reached through negotiations between the parties.