CHINA OILFIELD (02883) majority shareholder's shareholding plan extension

China Oilfield (02883) announces the progress of the shareholding plan by its controlling shareholder, CNOOC Limited. As of the disclosure date of this announcement, CNOOC Limited has increased its holdings in the company's H shares by 16.08 million shares through on-market transactions via Hong Kong Exchanges and Clearing Limited, representing approximately 0.34% of the total issued shares of the company. The cumulative amount of the increase is approximately RMB 809,817,000 (excluding taxes and fees). Following the implementation of the aforementioned increase, CNOOC Limited holds a total of 2.427 billion shares in the company, representing approximately 50.86% of the total issued shares of the company. Due to various factors such as holidays and changes in market conditions, the progress of this shareholding plan has been adjusted. Based on confidence in the company's future sustainable development and recognition of its long-term investment value, CNOOC Limited plans to extend the duration of the shareholding plan by 12 months to April 8, 2027. All other details of the shareholding plan remain unchanged.