Jun Qing Li

Daye Nonferrous Metals Group Holdings Ltd. engages in the provision of copper mining and mineral processing services. Its products include iron ore, molybdenum concentrate, copper cathode, sulfuric acid, gold, silver, platinum, palladium, molybdenum, rhenium, selenium, lead, zinc, bismuth, tellurium, and nickel sulfate. The company was founded in 1953 and is headquartered in Huangshi, China.

Chongqing Doyen (Holdings) Co. Ltd. is an investment holding company based in Chongqing, China. The Chinese company operates in equipment manufacturing and real estate. The company was founded by Siu Yu Lo and Xiao Bo Wang has been the CEO of the company since 2003.

Part of Dima Holdings Co., Ltd., Chengdu Dongyin Information Technology Co., Ltd. designs, develops, and distributes consumable digital information and computer network related software and hardware products. The company is based in Chengdu, China. Chengdu Dongyin Information Technology Co. was acquired by Dima Holdings Co., Ltd. from Chongqing Doyen (Holdings) Co. Ltd. on December 31, 2004 for $0.31 million.

Henan Golden Dragon Precise Copper Tube, Inc. engages in the manufacture and sale of copper pipes and tubes. Its business activities consist of the following: manufacture of non-ferrous metals; research, development, production and sale of new energy materials; hotel management; and mining business. Its products include high precision copper tubes, high efficient inner-grooved tubes, copper tubes with plastic, copper alloy tubes, capillary tubes, and tube fittings. The company was founded in 1987 and is headquartered in Xinxiang, China.

Yima Coal Industry Group Co Ltd is a state-owned manufacturing enterprise. The company mainly manufactures & distributes coals. It was founded in 1958 and is headquartered in Henan, CN.

Yima Coal Industry Group Ligou Mining Co., Ltd. engages in the operation of coal mines. Its business activities include procurement and sales of mining equipment; mining and sales of raw coal. The company was founded on June 26, 2007 and is headquartered in Luoyang, China.

Wafer Works (Shanghai) Co., Ltd. operates as a semiconductor company. It engages in the research, development, production, and sales of artificial semiconductor silicon epitaxial wafers which are used in automobiles, communications, power, industry, consumption electronics, high-end equipment, and other fields. The firm also provides other semiconductor silicon materials processing services. The company was founded on December 1, 1994 and is headquartered in Shanghai, China.

Yongmei Group Co., Ltd. engages in the mining, washing, processing, and sale of coal; deep processing of coal products; production and sales of coal chemical products; railway transportation; domestic trade; as well as import and export. The company was founded on October 17, 1997 and is headquartered in Yongcheng, China.

Yimei Group Yanguang Mining Industry Co., Ltd. is a Chinese company that wholesales mineral products. The company is based in Sanmenxia, China. The company was founded in 2011. The CEO is Jian Qing Wang. Yimei Group Yanguang Mining Industry Co. was acquired by Henan Dayou Energy Co., Ltd. from Yima Coal Industry Group Co., Ltd. on December 31, 2012 for $77.28 million.

Luoyang Jianguang Special Equipment Co., Ltd. engages in the research and development, production, and sale of industrial systems for the petrochemical, coal chemical, and new materials. It offers closed decoking system, hydraulic decoking system, and sulfur granulation system. The company was founded on June 10, 2015 and is headquartered in Luoyang, China.