[China Steel Structure] Announcement on the Appointment of Audit Committee Members

1. Date of change: 2026/05/28 2. Name of functional committee: Audit Committee 3. Names of outgoing members: Independent Director Li Hua-deng, Independent Director Li Xiu-ling, Independent Director Luo Wei 4. Profiles of outgoing members: Li Hua-deng (Retired Professor, Dept. of Mechanical Engineering, National Cheng Kung University), Li Xiu-ling (Retired Associate Professor, Dept. of Accounting, I-Shou University), Luo Wei (Member, Procurement Appeal Review Committee, Public Construction Commission, Executive Yuan) 5. Names of incoming members: Independent Director Jiang Jia-ling, Independent Director Chen Jin-fang, Independent Director Huang Zhong-fa 6. Profiles of incoming members: Jiang Jia-ling (Retired Partner, Deloitte & Touche), Chen Jin-fang (Director, Chang-Sheng Law Firm), Huang Zhong-fa (Distinguished Professor, Dept. of Civil Engineering, National Kaohsiung University of Science and Technology) 7. Nature of change: Expiration of term 8. Reason for change: Expiration of term 9. Original term: 2023/05/31 ~ 2026/05/30 10. Effective date for new members: 2026/05/28 11. Other matters: None