China Oil And Gas Group Limited, an investment holding company, primarily invests in natural gas and energy related businesses in the People's Republic of China and Canada. The company operates through four segments: Sales and Distribution of Natural Gas and Other Related Products; Gas Pipeline Construction and Connection; Exploitation and Production of Crude Oil and Natural Gas; and production and sales of coal-derived clean energy and other related products. It is involved in the piped city gas business, as well as design and construction of gas pipelines; and the transportation, distribution, and sale of compressed natural gas and liquefied natural gas. The company also produces and explores crude oil and natural gas, and other coal-derived clean energy and related products; constructs and operates gas pipelines, as well as involved in investment in energy related business. The company serves residential users; and industrial and commercial users. China Oil And Gas Group Limited is headquartered in Causeway Bay, Hong Kong.