King Stone Energy Group Limited, an investment holding entity founded in 1981 and headquartered in Central, Hong Kong, operates across the oil and gas and financing sectors in Hong Kong, the United States, and Mainland China. Its business activities are organized into seven distinct divisions: Silver Mining, Oil and Gas, Asset Financing, LNG, Tourism, Photovoltaic, and Trading. The company engages in the exploration, drilling, production, and sale of oil and natural gas within the United States. Additionally, it undertakes the mining and distribution of silver, notably managing two sites in the People's Republic of China: the Fu'an Silver mine, spanning 2.1 square kilometers in Fu'an City, and the Zherong Silver mine, covering 4.97 square kilometers in Zherong County. Financial services offered include finance leasing and factoring. King Stone Energy Group also participates in the trading of liquefied natural gas and provides tourism agency services across the People's Republic of China. Its operations further extend to managing a photovoltaic power generation project, which boasts a 4.085-megawatt capacity in China's Hebei Province. Moreover, the company trades various commodities, such as medical supplies, timber, and metals, within Hong Kong. The firm adopted the name King Stone Energy Group Limited in February 2010, having previously been known as Yun Sky Chemical (International) Holdings Limited.