Dong Yang Huang

China Ocean Oilfields Services (Hong Kong) Ltd. supplies machinery for oil and gas exploration. The company is based in Hong Kong, Hong Kong. The Chinese company is ultimately controlled by the Government of China.

Honghua Holdings Ltd. operates as an investment holding Chinese company and is ultimately controlled by the Government of China. The company is based in Chengdu, China.

Sichuan Honghua Petroleum Equipment Co. Ltd. engages in the research, design, manufacture, and general assembly of oil drilling rigs and equipment for oil exploration and development. The company is headquartered in Guanghan, China.

Honghua Offshore Oil & Gas Equipment (Jiangsu) Co., Ltd. engages in the design, manufacture, and sale of offshore oil and gas engineering equipment. Its business scope includes design, manufacture, repair, installation, and sale of offshore oil and natural gas drilling equipment, and marine engineering structure and marine engineering workboat and auxiliary ship; research and development of drilling and production automation system; design, drilling, and oil and gas field technical services; and design, manufacture, and sale of aluminum cans for storage used. The company was founded on June 8, 2009 and is headquartered in Nantong, China.