CSBC Board of Directors Approves Kaohsiung Plant Self-Built Floating Dock Project

1. Object Name and Nature: Self-built floating dock 2. Date of Fact Occurrence: May 11, 2026 - January 31, 2029 3. Date of Board Approval: May 11, 2026 4. Other Approval Date: N/A 5. Quantity, Unit Price, and Total Transaction Amount: 1 floating dock, budget NT$1.117 billion 6. Counterparty and Relationship with Company: None 7. If Counterparty is Related Party: N/A (Not a related party transaction) 8. Previous Owner in Last Five Years (if related party): N/A (Not a related party transaction) 9. Estimated Profit (or Loss) from Disposal (Not applicable for asset acquisition): N/A (Asset acquisition) 10. Delivery or Payment Terms, Contractual Restrictions, and Other Important Agreements: N/A 11. Decision-making Method (e.g., tender, comparison, negotiation), Reference Basis for Price, and Decision-making Unit: N/A 12. Professional Appraiser Firm and Appraisal Amount: N/A 13. Professional Appraiser Name: N/A 14. Professional Appraiser License Number: N/A 15. Was the appraisal report a limited, specific, or special price?: No or N/A 16. Is the appraisal report not yet obtained?: No or N/A 17. Reason for not obtaining appraisal report: N/A 18. Significant differences in appraisal results, reasons for differences, and accountant's opinion: N/A 19. Accounting Firm Name: N/A 20. Accountant Name: N/A 21. Accountant License Number: N/A 22. Broker and Brokerage Fee: N/A 23. Specific Purpose or Use of Acquisition: To enhance the company's shipbuilding production capacity. 24. Dissenting Directors' Opinions on this Transaction: None 25. Is this transaction a related party transaction?: No 26. Date of Supervisor Approval or Audit Committee Approval: May 6, 2026 27. Is this transaction to acquire real estate or its usage rights from a related party?: No 28. Price assessed in accordance with Article 16 of the "Regulations Governing the Acquisition or Disposal of Assets by Public Companies": N/A 29. If the assessed price in the preceding article is lower than the transaction price, the price assessed in accordance with Article 17 of the same regulations: N/A 30. Date of previous announcement of major information on the same event: N/A 31. Other statements: None