King Stone Energy Group Limited, an investment holding company, engages in exploration and production of oil and gas in the People's Republic of China and the United States. It operates through Silver Mining, Oil and Gas, Asset Financing, Tourism, Photovoltaic, and Trading segments. The company also engages in mining and sale of silver; provision of finance leasing and factoring, and tourism agency services; generates photovoltaic power; and trading commodities, including LNG, medical supplies and electronic parts, etc. In addition, it engages in trading of fruits, iron ore, timber, copper, nickel, coal, and electronic products; and operates solid waste disposal business. The company was incorporated in 1981 and is headquartered in Central, Hong Kong.