1314 Sinopec: Subsidiary Acquires Office Usage Rights from Related Party

Release Date: June 25, 2026 Time: 19:11:37 Company Code: 1314 Company Name: Sinopec Subject: Announcement by important subsidiary Dingyue Development Co., Ltd. regarding the acquisition of usage rights asset from a related party Applicable Clause: Clause 20 Factual Date: June 25, 2026

1. Name and nature of the subject asset (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Real estate usage rights for part of the 3rd floor office at No. 12, Dongxing Road, Songshan District, Taipei City

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

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Deputy General Manager of Sinopec Date: June 25, 2026 (Minguo Year 115)

5. Quantity of transaction units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Leased area: 62.58 ping; Unit price: NT$2,100 per ping per month (tax included); Monthly rent: NT$131,418 (tax included); Lease term: 12 months; Total value of right-of-use asset: NT$1,479,449 (excluding tax)

6. Counterparty and its relationship with the company (if the counterparty is a natural person and not a related party of the company, name disclosure may be omitted): Counterparty: China Petrochemical Industrial Development Co., Ltd. Relationship: Affiliated enterprise

7. If the counterparty is a related party, state the reason for selecting them, previous transferor, relationship among previous transferor, company and counterparty, previous transfer date, and amount: Reason for selecting related party: Location meets company requirements. Relationship among previous transferor, company, and counterparty: Not applicable. Previous transfer date and amount: Not applicable.

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

9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, provide details of recognition): Not applicable

10. Delivery or payment terms (including payment schedule and amount), contractual restrictions, and other important agreements: Payment terms: Monthly rent of NT$131,418 (tax included) Lease term: From July 1, 2026 to June 30, 2027

11. Method of determining the transaction (e.g., bidding, comparison, negotiation), reference basis for pricing, and decision-making unit: Transaction determination method: Negotiated based on market conditions Decision-making unit: Board of Directors

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

13. Name of professional appraiser: Not applicable

14. License number of professional appraiser: Not applicable

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

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

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

18. Reasons for significant differences in appraisal results and auditor's opinion: Not applicable

19. Name of accounting firm: Not applicable

20. Name of auditor: Not applicable

21. License number of auditor: Not applicable

22. Broker and brokerage fees: Not applicable

23. Specific purpose or use of acquisition or disposal: For office use

24. Dissenting director's opinion on 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 its usage rights from a related party: Yes

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

29. Evaluation price under Article 17 if the price under the previous item is lower than transaction price: Not applicable

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

31. Other statements: Contract signing will proceed after recent board approval.