Yu Hong Cao

Part of Hilong Holding Ltd., Shanghai Hilong Drill Pipe Co. Ltd. is a company that manufactures drilling pipes and related equipment. The company is based in Shanghai, China.

Shanghai Tube-Cote Petroleum Pipe Coating Co., Ltd. engages in the production and sale of anti-corrosion materials and related chemical products. Its business activates also include pipe coating, steel processing, and provision of after-sales services. The company was founded on March 8, 2002 and is headquartered in Shanghai, China.

Hilong Pipeline Engineering Technology Service Co., Ltd. specializes in the research and development of pipeline engineering technologies and services, including inside and outside coating of pipelines, inner filling by robots, oil pipe anticorrosion, and integrated pipeline services. The company was founded on November 9, 2005 and is headquartered in Shanghai, China.

Shanghai Hilong Shine New Material Co., Ltd. engages in the development and production of special coatings and chemical materials. Its business activities include construction of anti-corrosion insulation, installation and construction of chemical oil equipment pipelines, and import and export business. The company was founded on November 12, 2003 and is headquartered in Shanghai, China.