Tianjin Lvqing Pipeline Technology Co., Ltd. is a state-level high-tech enterprise which integrates R & D, production, trade and engineering technical services, which is mainly engaged in the production of oil and gas pipeline cleaning, testing and maintenance equipment. The company specializes in the production pipeline pig, detector, with pressure plugging equipment, tank automatic cleaning equipment and the corresponding spare parts, while the contract pipeline installation, change line, pigging, pressure test, dry, inside and outside the pipeline testing, Transmission openings, sealing, dimensional repair and tank cleaning and other technical services and engineering.

Green-company was founded in 2002, is located in Tianjin, China Tianjin Wuqing Jingbin Industrial Park. In 2004 the company passed the ISO9001 quality management system certification, in 2010 the pressure pipeline components manufacturing license and through the HSE management system certification, and was identified as state-level high-tech enterprises in 2011 to obtain pressure vessel manufacturing license by China National Petroleum and Natural Gas (GB1, GC2) and long-distance oil and gas pipeline with pressure sealing qualification, the same year the American Society of Mechanical Engineers ASME U certificate.

In February 2014, Green Ching Company successfully listed on the new board of the Shenzhen Stock Exchange