Grand Pacific Petrochemical: Announcement of the Board of Directors' Approval of Accounting Supervisor Change

1. Type of personnel change (please enter spokesperson, acting spokesperson, important operational supervisor (e.g., CEO, COO, CMO, CSO, etc.), financial supervisor, accounting supervisor, corporate governance supervisor, information security officer, R&D supervisor, internal audit supervisor, or litigation and non-litigation agent): Accounting supervisor 2. Date of occurrence of the change: 2026/05/12 3. Name, title, and brief resume of the former incumbent: Du Juan-Hua / Acting Head of Accounting Department 4. Name, title, and brief resume of the new incumbent: Li Yi-Fang / Deputy Head of Finance Department 5. Status of change (please enter "resignation", "job adjustment", "redundancy", "retirement", "death", "new appointment" or "dismissal"): Job adjustment 6. Reason for change: Job adjustment 7. Effective date: 2026/06/01 8. Other matters that need to be specified: None.