Yihai International Holding Ltd. (abbreviated “Yihai International”) announced that its Board, at a meeting on 24 March 2026, approved a resolution to:

1) Amend the existing Fourth Amended and Restated Memorandum and Articles of Association. 2) Adopt a new Fifth Amended and Restated Memorandum and Articles of Association (Fifth M&A).

Key points:

• Purpose of the amendments: incorporate requirements on general-meeting proceedings stipulated in paragraph 14(6) of Appendix A1 to the Hong Kong Listing Rules, ensuring full compliance with HKEX regulations.

• Approval process: the Proposed Amendments and Proposed Adoption will be tabled as a special resolution at the Company’s annual general meeting scheduled for on or around 26 May 2026.

• Effective date: the Fifth M&A will become effective immediately upon shareholder approval at the AGM.

• Shareholder communication: a circular detailing the amendments, together with the AGM notice, will be posted on the HKEX news website and the Company’s website (www.yihchina.com) in due course.

The announcement was released under HKEX Listing Rule 13.51(1). As of the announcement date, Yihai International’s Board comprises five executive directors (Sean Shi, Guo Qiang, Sun Shengfeng, Shu Ping, Zhao Xiaokai), one non-executive director (Zhang Yong) and three independent non-executive directors (Cui Jin, Wang Xin, Li Ping).