JHJ company was founded in 1939. It is a comprehensive R&D and manufacture base in China for chemical machinery and petrochemical equipments. JHJ was formerly named Jinxi Chemical Machinery Plant, an enterprise directly under the former Ministry of Chemical Industry, in 2000, it was reformed to Jinxi Chemical Machinery (Group) Co., Ltd. Then in December 2009, it was recombined with AVIC Shenyang Liming Aero-Engine (Group) Corporation Ltd. and renamed to AVIC Liming Jinxi Chemical Machinery (Group) Co., Ltd. The company has a floor area of 1.15 million square meters, assets amount to 1, 458 million RMB, and has 2470 employees. The company was one of the first companies in China who acquire design and manufature license for three categories of pressure vessels and acquired the American Society of Mechanical Engineers (ASME) certificate as well as U and U2 stamps. It can also design and manufacture various products according to international standards such as AD, API and TEMA. The company has already passed the certification of ISO 9001 quality system. It is a high-tech enterprise in China. The company has 2, 269 sets of tools for machining and welding, among which 110 sets of precision, heavy, rare or critical type. Main inspection and measurement devices include: physical and mechanical property tester, SP60 evolute gear tester, 6MEV standing wave linear accelerator, weld composition in-line detector, American 3D laser velocity-measuring system, agitating equipment test stand, turbine machinery test stand, special valve test stand, mechanical seal test stand, and so on.