Sinopec Subsidiary Dingyue Development Announces Cash Capital Increase and New Share Issuance

1. Board resolution date: 2026/06/18 2. Source of capital increase: Cash capital increase 3. Whether overall declaration is adopted for new share issuance (if yes, specify the planned issuance period; if no): No 4. Total issuance amount and number of shares (excluding employee allocation if from surplus or reserve capitalization): NT$1,000,000,000; 100,000,000 ordinary shares 5. Issuance amount and number of shares for overall declaration cases: Not applicable 6. Remaining amount and shares after issuance under overall declaration: Not applicable 7. Par value per share: NT$10 8. Issuance price: NT$10 9. Number of shares for employee subscription or allocation amount: 10,000,000 shares 10. Number of publicly offered shares: Not applicable 11. Subscription or free allocation ratio for existing shareholders: 90% 12. Handling of fractional shares and unclaimed shares: Authorized Chairman to arrange subscription by designated persons 13. Rights and obligations of the newly issued shares: Same rights and obligations as existing shares 14. Use of proceeds from capital increase: To strengthen operational funding 15. Rationality and necessity of fundraising after cash reduction (applicable if cash reduction was conducted in the current or previous year): Not applicable 16. Other matters to be disclosed: All matters related to this cash capital increase are authorized to the Chairman for full discretion.