CNOOC, or China National Offshore Oil Corporation, is a major state-owned oil and gas company in China. Founded in 1982, it focuses on the exploration and production of offshore oil and natural gas resources. CNOOC operates both domestically and internationally, with projects in various countries, contributing significantly to China's energy supply. The company is one of the largest producers of offshore oil in the world and plays a crucial role in China's energy strategy. CNOOC is also involved in refining and marketing petroleum products, as well as investing in renewable energy sources to diversify its portfolio.