【China Steel Chemical】Announcement of the Board of Directors' Approval of the Company's Q1 2026 Consolidated Financial Report

1. Date of submission to or resolution by the board of directors: 115/04/28 (2026/04/28) 2. Date of approval by the audit committee: 115/04/28 (2026/04/28) 3. Reporting period of financial report or annual self-reported financial information (YYY/MM/DD~YYY/MM/DD): 115/01/01~115/03/31 (2026/01/01~2026/03/31) 4. Accumulated operating revenue from January 1 to the end of this period (in thousands NTD): 1,277,807 5. Accumulated operating gross profit (loss) from January 1 to the end of this period (in thousands NTD): 319,750 6. Accumulated operating income (loss) from January 1 to the end of this period (in thousands NTD): 181,223 7. Accumulated net profit (loss) before tax from January 1 to the end of this period (in thousands NTD): 217,086 8. Accumulated net profit (loss) for this period from January 1 to the end of this period (in thousands NTD): 178,879 9. Accumulated net profit (loss) attributable to owners of the parent from January 1 to the end of this period (in thousands NTD): 178,879 10. Accumulated basic earnings per share (loss) from January 1 to the end of this period (NTD): 0.77 11. Total assets at the end of the period (in thousands NTD): 11,518,279 12. Total liabilities at the end of the period (in thousands NTD): 3,468,337 13. Equity attributable to owners of the parent at the end of the period (in thousands NTD): 8,049,942 14. Other matters to be specified: None