1718 Chung Hsin Fiber Announces Disposal of Real Estate in Kaohsiung for TWD 724.7 Million

Disclosure Date: 1150811 Statement Date: 1150810 Statement Time: 171738 Company Code: 1718 Company Name: Chung Hsin Fiber Subject: Announcement of Real Estate Disposal Relevant Clause: Clause 20 Factual Date: 1150810

Details:

1. Name and nature of the asset (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Land: No. 1086, Zhonglinzi Section, Siaogang District, Kaohsiung City. Buildings: No. 22, Daye South Road, Siaogang District, Kaohsiung City (Building Nos. 158-1, 158-2, Zhonglinzi Section).

2. Factual Date: 115/8/10 ~ 115/8/10

3. Board Approval Date: August 10, 115 (2026)

4. Other Approval Dates: Not applicable

5. Quantity of units (e.g., XX square meters, converted to XX ping), unit price, and total transaction amount: Land Area: 10,942.00 square meters (3,309.96 ping) Building Area: 5,370.88 square meters (1,624.69 ping) Total Transaction Amount: TWD 724,741,000

6. Counterparty and its relationship with the company (if the counterparty is a natural person and not a related party, name disclosure may be omitted): Counterparty: Yee-Dong Industrial Co., Ltd. Relationship: Not a related party of the company

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

8. If the asset was owned by a related party 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. Estimated gain (or loss) from disposal (not applicable for asset acquisitions; deferred gains/losses must be detailed): TWD 295,152,648

10. Delivery or payment terms (including payment schedule and amounts), contractual restrictions, and other important agreements: As per contract terms.

11. Transaction decision method (e.g., bidding, comparison, negotiation), pricing reference basis, and decision-making unit: Decision Method: Negotiation Pricing Basis: Based on professional appraisal value and market conditions Decision Unit: Authorized by the Board to the Chairman for full discretion

12. Name of the appraisal firm and appraisal value: Hong Bang Real Estate Appraisers Joint Office, Appraisal Value: TWD 718,051,778

13. Name of the appraiser: Li Qing-Tang

14. Appraiser License Number: (108) Taipei City Appraisal No. 000278

15. Whether the appraisal report specifies a restricted, special, or fixed 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. Explanation of significant differences in appraisal results and auditor’s opinion: Not applicable

19. Auditor Firm Name: Not applicable

20. Auditor Name: Not applicable

21. Auditor License Number: Not applicable

22. Broker and brokerage fee: Broker: Tai-Ching Real Estate Brokerage Fee: As per contract terms

23. Specific purpose or use of the acquisition or disposal: Asset optimization

24. Dissenting opinions from directors regarding the transaction: None

25. Is this a related-party transaction?: No

26. Date of supervisor approval or audit committee consent: August 10, 115 (2026)

27. Is the transaction for acquiring real estate or right-of-use assets from a related party?: No

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

29. Price evaluated under Article 17 if the price 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 disclosures: None