Hsintai Engineering Announces Disposal of Right-of-Use Assets (Early Termination of Lease Agreement)

1. Name and nature of the subject property (e.g., land located at Section XX, Subsection XX, North District, Taichung City): 15th and 16th floors, No. 95, Section 2, Dunhua South Road, Taipei City

2. Date on which the event occurred: June 16, 2026 ~ June 16, 2026

3. Board approval date: June 16, 2026

4. Other approval dates: Not applicable

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Lease contract to be terminated early effective June 30, 2026

15th floor: Total 53 ping, average monthly rent per ping approximately NT$2,758–2,841 (excluding tax) Total contract amount: NT$5,699,317 (excluding tax) Reduction in right-of-use asset net value: NT$2,302,601 Reduction in total lease liability: NT$2,373,899

16th floor: Total 224.04 ping, average monthly rent per ping approximately NT$2,758–2,841 (excluding tax) Total contract amount: NT$25,327,801 (excluding tax) Reduction in right-of-use asset net value: NT$9,760,795 Reduction in total lease liability: NT$10,034,879

6. 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): Counterparty: Continental Engineering Corporation Relationship with the company: Affiliated company

7. If the counterparty is a related party, state the reason for selecting the related party as the transaction counterpart, the previous transferor, the relationship among the previous transferor, the company, and the counterparty, the previous transfer date, and the transfer amount: 1. Reason for selecting related party as counterparty: Early termination of lease agreement 2. Previous transferor: Not applicable 3. Relationship among previous transferor, company, and counterparty: Not applicable 4. Previous transfer date: Not applicable 5. Transfer 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 date of acquisition and disposal, price, and relationship with the company at the time of transaction: Not applicable

9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, provide a table showing recognition): Estimated disposal gain: NT$345,382

10. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: Not applicable

11. Decision method for this transaction (e.g., bidding, price comparison, negotiation), reference basis for price determination, and decision-making unit: 1. Transaction decision method: Not applicable 2. Reference basis for price determination: Not applicable 3. Decision-making unit: Board approval

12. Name of professional appraiser firm or company and appraisal amount: Not applicable

13. Name of professional appraiser: Not applicable

14. Professional appraiser license number: Not applicable

15. Whether the appraisal report indicates a limited price, specific price, or special price: No or not applicable

16. Whether the appraisal report has not yet been obtained: No or not applicable

17. Reason for not obtaining the appraisal report: Not applicable

18. If there is a significant difference in the appraisal result, the reason and auditor's opinion: Not applicable

19. Name of accounting firm: Not applicable

20. Name of auditor: Not applicable

21. Auditor license number: Not applicable

22. Broker and brokerage fee: Not applicable

23. Specific purpose or use of the acquisition or disposal: Based on overall operational planning

24. Opinion of any director who objected to this transaction: None

25. This transaction is a related-party transaction: Yes

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

27. This transaction involves acquiring real estate or right-of-use assets from a related party: No

28. Valuation amount under Article 16 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies': Not applicable

29. Valuation amount under Article 17 of the same rules if the valuation under the previous item is lower than the transaction price: Not applicable

30. Previous date of material information disclosure regarding the same event: Not applicable

31. Other explanatory matters: None