BES Engineering (2515) Announces Resignation of Chairman

Announcement Date: May 20, 2026 Statement Date: May 19, 2026 Statement Time: 17:24:53 Company Code: 2515 Company Name: BES Engineering Subject: Public announcement regarding the resignation of the Chairman Compliance Clause: Section 6 Event Date: May 19, 2026

Explanation: 1. Date of Board Resolution or Change: May 19, 2026 2. Personnel Category (Chairman or General Manager): Chairman 3. Name of Predecessor: Zhou Zhiming 4. Profile of Predecessor: Chairman of the company 5. Name of Successor: Not applicable 6. Profile of Successor: Not applicable 7. Nature of Change: Resignation 8. Reason for Change: Resigned due to personal reasons 9. Effective Date for Successor: Not applicable 10. Other Matters: The predecessor's resignation is effective as of May 19, 2026. The new Chairman will be announced following the appointment by the Board of Directors.