Recently, China Oilfield Services Limited (“COSL” or the “Company”) received notification from Hang Seng Indexes Company Limited that the Company has been simultaneously selected as a constituent of three Hang Seng Sustainability Indexes: the “Hang Seng (China A) Corporate Sustainability Benchmark Index”, the “Hang Seng (China A) Corporate Sustainability Index” and the “Hang Seng (Mainland and Hong Kong) Corporate Sustainability Index”. This recognition reflects the Company’s ongoing efforts in corporate governance, environmental protection, social responsibility, information disclosure, and investor relations, which have been widely acknowledged by the capital market.

The Hang Seng Corporate Sustainability Index Series covers Hong Kong and Mainland China listed companies that excel in sustainability, and leaders in sustainable development. The selection process for constituent stocks is rigorous, with corporate sustainability ratings based on a framework designed by the Hong Kong Quality Assurance Agency, an independent professional assessment body. This ensures that the Hang Seng Corporate Sustainability Index Series is objective, reliable, and highly investable, providing a high-quality benchmark for sustainability-themed index funds.

In recent years, under the guidance of the five development strategies, the Company has been committed to taking deepening reform as the driving force, accelerated the cultivation of new quality productive forces in energy services, comprehensively built world-class core competitiveness, improved the corporate governance capacity and governance level on an ongoing basis, and made a big leap in the quality and efficiency of the Company’s operations. While pursuing high-quality development, the Company is firmly committed to corporate social responsibility, actively exploring new ways of sustainable development to create greater value to reward the society and investors. At the same time, the Company strictly fulfils its information disclosure obligations, strengthens voluntary information disclosure, pays great attention to investor interests, maintains multi-dimensional and effective communication with all walks of life, and is committed to achieving win-win results with customers, employees, partners and shareholders.