[CTBC Holding] Subsidiary CTBC Venture Capital Announces Resolution to Invest in 25Madison Ventures Fund II, L.P.

1. Name and nature of the subject matter (if preferred shares, specify issuance terms such as dividend rate): 25Madison Ventures Fund II, L.P.; a private equity fund

2. Date of occurrence: 115/09/23

3. Number of units, unit price, and total transaction amount: Not applicable, not applicable, up to USD 5 million

4. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party of the company, name disclosure may be omitted): 25Madison Ventures Management Company, LLC; non-related party

5. If the counterparty is a related party, state the reason for selecting them, previous transferor, relationships among the previous transferor, the company, and the counterparty, previous transfer date, and transfer amount: Not applicable

6. If the owner of the subject matter was a related party of the company within the past five years, disclose the related party’s acquisition and disposal dates, prices, and relationship with the company at the time: Not applicable

7. Matters regarding the disposition of claims (including types of collateral attached to disposed claims; if claims against related parties are involved, disclose the names and book amounts of such claims): Not applicable

8. Gain (or loss) from disposition (not applicable for acquisition of securities) (if deferred, list recognition schedule): Not applicable

9. Delivery or payment terms (including payment period and amounts), contractual restrictions, and other important agreements: Delivery or payment terms (including payment period and amounts): As stipulated in the contract; Contractual restrictions and other important agreements: As stipulated in the contract

10. Decision-making method for this transaction, reference basis for pricing, and decision-making unit: Decision-making method and pricing reference: As stipulated in the contract; Decision-making unit: According to the company’s internal approval authority

11. Net asset value per share of the issuer of the acquired or disposed securities: Not applicable

12. Difference between private placement reference price and per-unit transaction price exceeds 20%: Not applicable

13. Cumulative holdings (including this transaction) of the securities involved, in quantity, amount, ownership percentage, and any rights restrictions (e.g., pledge status) to date: Parent company: No holdings of these securities Company: Not applicable, up to USD 5 million, expected ownership below 10%, no restrictions Subsidiaries: No holdings of these securities

14. Proportion of private securities investments (including this transaction) to total assets and equity attributable to owners of the parent in the most recent financial statements, and amount of working capital in the most recent financial statements: 0.58% of total assets, 0.72% of equity attributable to owners of the parent, Working capital: Not applicable

15. Manager and brokerage fees: Not applicable

16. Specific purpose or use of the acquisition or disposition: Long-term investment

17. Dissenting directors’ opinions on this transaction: Not applicable

18. Whether this transaction is a related-party transaction: No

19. Board of Directors approval date: Not applicable, outside the scope of board approval authority

20. Supervisor acknowledgment or Audit Committee approval date: Not applicable, outside the scope of board approval authority

21. Whether auditors issued an adverse opinion on this transaction: Not applicable

22. Name of accounting firm: Not applicable

23. Auditor name: Not applicable

24. Auditor license number: Not applicable

25. Other disclosures: None