4532 Jui-Jih: Announcement of Change in Corporate Director Representative

Release Date: June 24, 2026 Statement Date: June 23, 2026 Statement Time: 15:42:28 Company Code: 4532 Company Name: Jui-Jih Subject: Announcement of Change in Corporate Director Representative Applicable Clause: Clause 6 Factual Date: June 23, 2026

Details: 1. Date of Change: June 23, 2026 2. Corporate Name: China Steel Corporation 3. Former Representative: Mr. Liu Hong-Yi 4. Former Representative's Background: Executive Vice President and Chief Information Security Officer 5. New Representative: Mr. Huang Qing-Yuan 6. New Representative's Background: Assistant Vice President, Technology Division 7. Reason for Change: Reassignment 8. Original Term: June 12, 2026 to June 11, 2029 9. Effective Date of New Appointment: June 23, 2026 10. Other Matters to be Disclosed: None.