8499 Dingxuan-KY Announces Subsidiary Longyang Electronics (Kunshan) Disposes of Deposit Financial Product

Announcement Date: June 26, 2026 Statement Date: June 25, 2026 Statement Time: 16:14:55 Company Code: 8499 Company Name: Dingxuan-KY Subject: Announcement by subsidiary Longyang Electronics (Kunshan) Co., Ltd. regarding disposal of a deposit financial product Applicable Clause: Clause 20 Factual Date: June 25, 2026

Details: 1. Name and nature of the subject matter (if preferred shares, specify dividend rate and other terms): CITIC Trust - Xinwenying 6M210 Collective Fund Trust Plan WM0279

2. Factual Date: June 25, 2026 ~ June 25, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Executed according to company's approval authority June 25, 2026 (Republic Era 115)

5. Transaction quantity, unit price, and total transaction amount: 6M210 WM0279 188 days: RMB 49.7 million

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): China Trust Commercial Bank Co., Ltd.; Relationship with company: None

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

8. If the owner of the subject asset was a related party of the company within the past five years, disclose the related party's acquisition and disposal date, price, and relationship with the company at the time: Not applicable

9. Matters related to disposal of receivables (including types of collateral attached to disposed receivables; if receivables from related parties, disclose names and book value): Not applicable

10. Gain (or loss) from disposal (not applicable for acquisition of securities) (if deferred, explain recognition in table form): Approximately NT$3,106,000

11. Delivery or payment terms (payment period and amount), contractual restrictions, and other important agreements: Paid in full

12. Decision-making method for this transaction, reference basis for pricing, and decision-making unit: Executed according to company's approval authority

13. Net asset value per share of the securities-issuing company: Not applicable

14. Cumulative holdings (including this transaction) to date: quantity, amount, ownership percentage, and restricted rights (e.g., pledge status): Quantity: Not applicable Amount: RMB 49.7 million Ownership percentage: Not applicable Restricted rights status: None Cumulative holding amount: RMB 49.7 million

15. Cumulative securities investments (including this transaction) under Article 3 of the 'Regulations on Acquisition or Disposition of Assets by Publicly Issued Companies' as a percentage of total assets and equity attributable to owners of parent company in the latest financial statements, and amount of working capital in latest financial statements (Note 2): (1) Percentage of total assets: 23.869% (2) Percentage of equity attributable to owners of parent company: 46.544% (3) Working capital amount: NT$6,975,964,000

16. Broker and brokerage fees: Not applicable

17. Specific purpose or use of acquisition or disposal: Short-term investment

18. Dissenting opinions from directors regarding this transaction: Not applicable

19. Is this transaction a related-party transaction? No

20. Date of supervisor approval or audit committee consent: Not applicable

21. Did the accountant issue a non-reasonableness opinion? Not applicable

22. Name of accounting firm: Not applicable

23. Name of accountant: Not applicable

24. Accountant's license number: Not applicable

25. Does this involve a change in business model? No

26. Explanation of business model change: Not applicable

27. Transaction history with counterparty in the past year and expected in the next year: Not applicable

28. Source of funds: Internal funds

29. Previous material information announcement date for the same event: Not applicable

30. Other explanatory matters: None