Jin Rong Jie·2025-08-25 08:47Group 1 - The Shanghai Composite Index rose by 1.51% to close at 3883.56 points, while the Hang Seng Index increased by 1.94% to 25829.91 points [1] - China Oilfield Services Limited (COSL) has an AH premium of 114.04%, ranking 20th among AH shares [1] - COSL's A-shares closed at 14.62 yuan, up by 1.39%, and H-shares closed at 7.46 HKD, increasing by 0.4% [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]