香港交易及結算所有限公司及香港聯合交易所有限公司對本公告的內容概不負責，對其 準確性或完整性亦不發表任何聲明，並明確表示，概不對因本公告全部或任何部分內容 而產生或因倚賴該等內容而引致的任何損失承擔任何責任。 2883 孫維洲 公司秘書 二零二五年八月十四日 - 1 - 中海油田服務股份有限公司（「本公司」）擬於2025年8月26日在香港聯合交易所有限公司網 站(https://www.hkexnews.hk)公佈本公司2025年中期業績公告。為了便於廣大投資者更全 面深入地了解本公司2025年中期業績和經營情況，本公司擬於2025年8月27日（星期三） 10:00-11:00召開業績說明會（「本次業績說明會」），就投資者普遍關心的問題進行交流。 本公司董事長兼首席執行官趙順強先生，副總裁兼公司秘書孫維洲先生，首席財務官郄 佶先生及一名獨立非執行董事將出席本次業績說明會（如有特殊情況，參會人員可能調 整）。 本次業績說明會召開後，本公司將通過本公司網站(https://www.cosl.com.cn)「投資者關係」 專欄分享本次業績說明會的有關資料，向投資者介紹本次業績說明會的有關情況。 承董事會命 本次業績 ...

Group 1 - The Shanghai Composite Index rose by 0.48% to close at 3683.46 points, while the Hang Seng Index increased by 2.58% to 25613.67 points [1] - China Oilfield Services Limited (COSL) has an AH premium of 112.57%, ranking 19th among AH stocks in terms of premium rate [1] - COSL's A-shares closed at 14.01 yuan, remaining flat, while its H-shares closed at 7.21 Hong Kong dollars, up by 0.14% [1] Group 2 - COSL is recognized as a large-scale integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - The company's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] - COSL was publicly listed on the Hong Kong Stock Exchange on November 20, 2002, and began trading on the Shanghai Stock Exchange on September 28, 2007 [1]

Company Overview - China Oilfield Services Limited (COSL) is a major integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - COSL's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] Stock Performance - On August 12, the Shanghai Composite Index rose by 0.5%, closing at 3665.92 points, while the Hang Seng Index increased by 0.25%, closing at 24969.68 points [1] - COSL's A-shares closed at 14.01 yuan, with an increase of 0.79%, while its H-shares closed at 7.2 Hong Kong dollars, up by 1.84% [1] A/H Share Premium - COSL's A/H share premium reached 112.43%, ranking it 22nd among A/H shares in terms of premium rate [1][2]

Group 1 - The Shanghai Composite Index rose by 0.34% to close at 3647.55 points, while the Hang Seng Index increased by 0.19% to 24906.81 points [1] - China Oilfield Services Limited (COSL) has an AH premium of 114.89%, ranking 21st among AH shares [1] - COSL's A-shares closed at 13.9 yuan, down 0.79%, and H-shares closed at 7.07 HKD, down 0.28% [1] Group 2 - COSL is a major integrated oilfield service provider globally, offering services across all stages of offshore oil and gas exploration, development, and production [1] - The company's business is divided into four main categories: geophysical exploration services, drilling services, oilfield technical services, and marine services [1] - COSL was publicly listed on the Hong Kong Stock Exchange on November 20, 2002, and has been trading in the U.S. OTC market since March 26, 2004, and on the Shanghai Stock Exchange since September 28, 2007 [1]

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Group 1 - The company, CNOOC Oilfield Services (02883.HK), announced that it will hold a board meeting on August 26, 2025, to review and potentially approve its interim results for the six months ending June 30, 2025 [1]

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Market Performance - The oil service engineering sector rose by 0.6% on August 6, with CNOOC Services leading the gains [1] - The Shanghai Composite Index closed at 3633.99, up 0.45%, while the Shenzhen Component Index closed at 11177.78, up 0.64% [1] Individual Stock Performance - Notable gainers included: - CNOOC Services (601808) at 14.04, up 1.23% with a trading volume of 80,500 shares and a turnover of 112 million yuan [1] - Zhongman Petroleum (603619) at 19.32, up 1.20% with a trading volume of 81,000 shares and a turnover of 156 million yuan [1] - Huibo Yin (002554) at 2.91, up 1.04% with a trading volume of 280,000 shares and a turnover of 81.09 million yuan [1] Capital Flow Analysis - The oil service engineering sector experienced a net outflow of 58.64 million yuan from institutional investors and 28.80 million yuan from retail investors, while retail investors saw a net inflow of 87.44 million yuan [2] - Individual stock capital flows showed: - Zhongyou Engineering (600339) had a net inflow of 6.99 million yuan from institutional investors [3] - Huibo Yin (002554) had a net inflow of 3.08 million yuan from retail investors [3] - CNOOC Services (601808) saw a net outflow of 6.14 million yuan from institutional investors [3]

Core Viewpoint - The case of Li Yong, former Deputy Secretary of the Party Group and General Manager of China National Offshore Oil Corporation (CNOOC), has been adjudicated, resulting in a 14-year prison sentence for bribery and a fine of 3 million RMB [1][2]. Group 1 - Li Yong was found guilty of accepting bribes totaling over 67.94 million RMB from 1996 to 2023 while holding various senior positions within CNOOC [1]. - The court determined that Li Yong's actions constituted a particularly large amount of bribery, warranting legal punishment [2]. - Mitigating factors included Li Yong's confession, cooperation with authorities, and full restitution of the illicit gains, which led to a lighter sentence [2].

Core Viewpoint - The China Securities Index for Hong Kong Stock Connect Energy Composite Index has shown significant growth, with a 7.12% increase over the past month, 17.31% over the past three months, and a 5.25% increase year-to-date [1]. Group 1: Index Performance - The China Securities Index for Hong Kong Stock Connect Energy Composite Index reported a value of 3323.71 points [1]. - The index is based on a sample of all securities classified under the China Securities Industry Classification Standard, reflecting the overall performance of different industry securities within the Hong Kong Stock Connect [1]. Group 2: Index Composition - The top ten weighted stocks in the index include: China Petroleum (14.55%), China Shenhua (14.48%), CNOOC (14.32%), Sinopec (14.25%), China Coal Energy (13.01%), Yancoal Australia (5.42%), China Oilfield Services (3.99%), Shougang Resources (1.89%), and Mongol Mining (1.61%) [1]. - The index is composed entirely of stocks listed on the Hong Kong Stock Exchange [2]. Group 3: Sector Allocation - The sector allocation within the index shows that coal accounts for 43.49%, integrated oil and gas companies for 28.79%, oil refining for 17.04%, oilfield services for 3.99%, coke for 3.50%, oil and gas extraction for 1.80%, and oil and gas circulation and others for 1.39% [2]. - The index samples are adjusted biannually, with adjustments occurring on the next trading day following the second Friday of June and December [2].