[Yihsin Industry] Announcement of the Board of Directors' Approval of the Q1 2026 Financial Report

1. Date of submission to or resolution by the Board of Directors: 2026/05/12 2. Date of approval by the Audit Committee: 2026/05/12 3. Reporting period of financial report or annual self-compiled financial information (YYYY/MM/DD~YYYY/MM/DD): 2026/01/01~2026/03/31 4. Cumulative operating revenue from January 1 to the end of this period (in thousands of NTD): 294,726 5. Cumulative operating gross profit (loss) from January 1 to the end of this period (in thousands of NTD): 51,040 6. Cumulative operating profit (loss) from January 1 to the end of this period (in thousands of NTD): 41,087 7. Cumulative net profit (loss) before tax from January 1 to the end of this period (in thousands of NTD): 41,791 8. Cumulative net profit (loss) for this period from January 1 to the end of this period (in thousands of NTD): 34,192 9. Cumulative net profit (loss) attributable to owners of the parent from January 1 to the end of this period (in thousands of NTD): 34,192 10. Cumulative basic earnings per share (loss) from January 1 to the end of this period (in NTD): 0.51 11. Total assets at the end of the period (in thousands of NTD): 2,260,797 12. Total liabilities at the end of the period (in thousands of NTD): 971,389 13. Equity attributable to owners of the parent at the end of the period (in thousands of NTD): 1,289,408 14. Other matters to be specified: None