[Chia Her] Announcement on Behalf of Subsidiary Meng Hui Construction Co., Ltd. Regarding Board Approval of Material Resolutions

1. Date of occurrence: 2026/05/18 2. Company name: Meng Hui Construction Co., Ltd. 3. Relationship with the Company (please enter "the Company" or "subsidiary"): Subsidiary 4. Mutual shareholding ratio: A subsidiary in which the Company holds a 47.47% comprehensive stake 5. Reason for occurrence: Announcement on behalf of the subsidiary regarding the board of directors' approval of important resolutions (1) The subsidiary signed a construction contract with the Company on June 30, 2025, for NT$866,142,853 (tax included). Subsequently, due to project needs, a supplementary contract was signed to review and change the contracted project items and scope, with the total contract price remaining unchanged after the change. (2) To assist the Company in supervising the construction progress and quality acceptance of a third party, the subsidiary's board approved the signing of a tripartite mechanical and electrical engineering construction and management agreement for NT$13,500,000 (tax included). 6. Countermeasures: Proceed with contract signing after board approval. 7. Other matters that should be specified (if the subject of the event or resolution is a public company or above, this material information also complies with Article 7, Paragraph 9 of the Enforcement Rules of the Securities and Exchange Act, concerning matters that have a material impact on shareholders' equity or securities prices): None.