Aluminum Corporation of China Limited (CHALCO) will convene its 2026 Second Extraordinary General Meeting (EGM) at 2:00 p.m. on Wednesday, 23 September 2026 in the Company’s conference room at No. 62 North Xizhimen Street, Haidian District, Beijing, PRC.

The meeting will consider one special resolution: approval of amendments to the Rules of Procedures for the Board Meeting. Shareholders holding either A Shares or H Shares are entitled to attend in person or appoint a proxy.

Key arrangements: • Proxy forms, accompanied by any required notarised authorisations, must be lodged no later than 24 hours before the meeting.  – A-shareholders should submit documents to the security affairs division of the finance department (capital operation department) at the Company’s Beijing headquarters.  – H-shareholders should deliver documents to Computershare Hong Kong Investor Services Limited, 17M Floor, Hopewell Centre, 183 Queen’s Road East, Wanchai, Hong Kong. • Shareholders may appoint the EGM Chairman or another individual as proxy and may specify voting instructions—For, Against or Abstain—for the resolution. • In the absence of specific instructions, proxies may vote at their discretion, including on any additional resolutions properly introduced at the EGM.

Joint shareholders may have any one holder vote, but if multiple joint holders attend, only the first-named in the register may vote. The proxy form must be duly signed by the shareholder or an authorised representative, and any alterations require initialling.

The EGM notice and accompanying circular, both dated 7 August 2026, provide full details on participation procedures and the proposed revisions to the Board’s procedural rules.