China Oil & Gas Group Limited issued a shareholder notice on 16 September 2026 confirming that the company’s latest Interim Report is now available in both English and Chinese on its corporate website (www.hk603.com) and HKEXnews (www.hkexnews.hk).

Key points:

• Scope of release – The Interim Report represents the company’s “Current Corporate Communication” under Hong Kong Listing Rule 2.07A, which governs the expanded paperless regime for listed issuers.

• Access options – Shareholders who have previously elected to receive printed materials will receive a hard copy enclosed with the notice. – Non-registered shareholders encountering access difficulties can request a printed version free of charge through the Hong Kong branch share registrar, Computershare Hong Kong Investor Services Limited.

• Change-of-preference mechanism – Investors may alter their future communication method at any time by returning a reply form to the registrar or emailing ecomm@hk603.com. – Those wishing to continue receiving printed documents must explicitly opt in; otherwise, all future corporate communications will be provided exclusively online.

• Compliance with paperless listing regime – Consistent with Rule 2.07A, China Oil & Gas will discontinue routine mailing of printed corporate documents. Both English and Chinese versions of all future announcements, circulars and reports will be posted electronically.

• Action required for non-registered shareholders – Holders whose shares are kept through banks, brokers, custodians or clearing nominees are urged to provide a functional email address to their intermediaries. Failure to do so will mean no automatic notification of new corporate communications, necessitating regular checks of the company and HKEXnews websites.

Investor enquiries can be directed to the company at +852 2200 2222 during Hong Kong business hours.