China Oil And Gas Group Limited China Oil And Gas Group Limited (CLSZF), an investment holding company incorporated in 1993 and headquartered in Causeway Bay, Hong Kong, engages in natural gas and energy-related businesses primarily in Hong Kong, Mainland China, and Canada. The company operates through four main segments, including sales and distribution of natural gas and related products such as compressed natural gas, liquefied natural gas, and piped city gas to residential, industrial, and commercial users; gas pipeline construction and connection encompassing transmission pipelines, liquefied natural gas factories, compressed natural gas primary stations, and natural gas refueling stations; exploitation and production of crude oil and natural gas along with other upstream energy resources; and production and sales of coal-derived clean energy and related products involving coal processing, natural gas trading, transportation, and finance services. In November 2025, China Oil And Gas Group Limited announces a strategic merger and acquisition agreement through its subsidiary Shengli Share with China Oil Investment, Tiandalitong, and CCNG to acquire 100% equity interests in China Oil Zhuhai and Tiandashengtong, 51% in Nantong Oil, and 40% in Ganhe China Oil via share issuance at RMB3.07 per share and cash payments, with new shares subject to a 36-month lock-up that strengthens its asset portfolio and competitive position in the oil and gas industry.