CPDC Announces New Merger Effective Date with Subsidiary Zhaoxin Chemical

Announcement Date: May 16, 2025 (115/05/16) Announcement Date: May 15, 2025 (115/05/15) Announcement Time: 19:37:01 Company Code: 1314 Company Name: China Petrochemical Development Corporation Subject: Announcement of the Merger Effective Date for the Merger between the Company and its 100% Subsidiary, Zhaoxin Chemical Co., Ltd. Clause Compliance: Article 20 Event Date: May 15, 2025 (115/05/15) Description: 1. Original Announcement Date: December 11, 2023 (114/12/11) 2. Brief Summary of Original Announcement Filing: On December 11, 2023 (114/12/11), the Company's Board of Directors resolved to merge with its 100% subsidiary, Zhaoxin Chemical Co., Ltd., and announced it on the same day. The merger effective date was set for February 1, 2026 (115/02/01). Subsequently, on January 29, 2026 (115/01/29), it was announced that the merger effective date was adjusted to April 1, 2026 (115/04/01). On March 23, 2026 (115/03/23), due to ongoing operational procedures, the merger effective date was further postponed. The actual merger effective date will be determined and announced separately based on relevant operational progress and actual circumstances. 3. Reason for Change and Main Content: In coordination with relevant operations and progress planning, the merger effective date has been set for June 1, 2026 (115/06/01). 4. Impact of Change on Company's Financial and Business Operations: None. 5. Other Matters to be Notified: None.