China oil gas station. Kaoshantun Service Area is located in Pulandian District, Dalian City, Liaoning Province, China, and includes facilities such as catering, refueling and toilets. Among them, the gas station is China Petroleum, and China Petroleum and Natural Gas Group Corporation is an important state-owned backbone enterprise. Is a comprehensive international energy company focusing on oil and gas business, engineering technical services, petroleum engineering construction and new energy development, and is one of the major oil and gas producers and suppliers in China.