Announcement of Company Name Change: Chieng Sheng Hsin Co., Ltd. renamed to Chieng Sheng Hsin Investment Holding Co., Ltd.

Announcement Date: April 13, 2026 Issuance Date: April 12, 2026 Issuance Time: 07:00:03 Company Code: 1463 Company Name: Chieng Sheng Hsin Subject: Announcement of the company's name change from "Chieng Sheng Hsin Co., Ltd." to "Chieng Sheng Hsin Investment Holding Co., Ltd.", with an announcement period from February 12, 2026 to May 11, 2026. Applicable Clause: Article 51 Date of Occurrence: February 11, 2026 Explanation: 1. Date of occurrence of the event: February 11, 2026 (Republic of China Calendar 115) 2. Company name: Chieng Sheng Hsin Investment Holding Co., Ltd. (Original name: Chieng Sheng Hsin Co., Ltd.) 3. Relationship with the company (please enter 'this company' or 'subsidiary'): This company 4. Mutual shareholding ratio: Not applicable 5. Reason for occurrence: (1) Date of approval for company name change / Date of occurrence: February 11, 2026 (Republic of China Calendar 115) (2) Approval document number for company name change: Economic Affairs, Commerce Department, No. 11530001440 (3) Date of shareholder meeting resolution approving the name change: December 1, 2025 (Republic of China Calendar 114) (4) Former company name: Chieng Sheng Hsin Co., Ltd. (5) New company name: Chieng Sheng Hsin Investment Holding Co., Ltd. (6) Former company abbreviation: Chieng Sheng Hsin (7) New company abbreviation: Chieng Sheng Hsin 6. Countermeasures: None 7. Other matters to be specified: (1) The company obtained the approval letter for change registration from the Ministry of Economic Affairs on February 11, 2026 (dispatch date: February 12, 2026, Republic of China Calendar 115). In accordance with Article 45 of the Operating Rules of the Taiwan Stock Exchange Corporation, this announcement will be continuously published for three months. (2) The company's stock code for trading on the centralized securities exchange market remains unchanged as "1463."