King Stone Energy Group Limited is a limited liability company. The Company is engaged in mining and selling of coal, trading of phosphorus products and trading of optical products. The Company owns coal mines in Eerduosi, Inner Mongolia, China. On 11 August 2011, the Company acquired a 100% equity interest in a coal mine in the People�s Republic of China (PRC), Liaoyuan, which owns and operates a thermal coal mine in Eerduosi City, Inner Mongolia. Its subsidiaries include Triumph Fund A Limited, Shanxi Hengchuang Industrial Co., Ltd., Shanxi Puhua Deqin Metallurgy Technology Co., Ltd., Eerduosi Hengtai Coal Co., Ltd. (Hengtai), Inner Mongolia Liaoyuan Coal Mining Co., Ltd. (Liaoyuan) and others.