Subject Supplemental information related to the unsecured corporate bond issuance approved by the Board of Directors on December 11, 2024

1.Date of the board of directors resolution: NA
2.Name [issue no. of (secured, unsecured) corporate bonds of (company)]: First unsecured corporate bond issue in 2025 of
   Taiwan High Speed Rail Corp.
3.Whether to adopt shelf registration (Yes/No): No.
4.Total amount issued: Total amount is NT$ 1 billion.
5.Face value per bond: NT$ 10 million.
6.Issue price: At par value.
7.Issuance period: 4 years.
8.Coupon rate: Fixed coupon rate 1.55%.
9.Types, names, monetary values and stipulations of collaterals: NA.
10.Use of the funds raised by the offering and utilization plan: Proceeds will be used in the social benefit investment plan. 
11.Underwriting method: Public offering.
12.Trustees of the corporate bonds: Taishin International Bank Co., Ltd.
13.Underwriter or agent: MasterLink Securities Co. Ltd. as a lead underwriter.
14.Guarantor(s) for the issuance: NA.
15.Agent for payment of the principal and interest: Taishin International Bank Co. Ltd., Jianpei Branch
16.Certifying institution: NA.
17.Where convertible into shares, the rules for conversion: NA.
18.Sell-back conditions: NA.
19.Buyback conditions: NA.
20.Reference date for any additional share exchange, stock swap, or subscription: NA.
21.Possible dilution of equity in case of any additional share exchange, stock swap, or subscription: NA.
22.Any other matters that need to be specified: None.