China United Engineering Company, formerly known as the second Design Institute of mechanical industry, is one of the first large-scale comprehensive design institute of the new China, the country to undertake various types of machinery factory design and technical transformation tasks. In 1958, according to the division of the national industry, mainly responsible for power generation equipment manufacturing industry (boiler, steam turbine, power station auxiliary), general equipment manufacturing industry (fan, compressor, pump, valve, cooling machine, air separation equipment, vacuum equipment, separation equipment, plastic machinery, etc.) design and development planning, basic construction and technical transformation projects and instrument manufacturing industry, and undertake the design task related to the production of special equipment, automatic line test device, making contribution to the establishment of the system of China's machinery industry.

Power generation equipment, Chinese United counterpart service general equipment and other industries are major national technology and equipment with large, heavy load and high speed, high pressure, high temperature, high precision, high torque, high impact performance and characteristics. Casting, forging, for major components of blank finishing, large steel structure, container welding, heat treatment, test device of thick wall parts and fittings required for nondestructive testing, is the key to ensure the performance and quality of the products, is an important problem to be solved in engineering design and construction. For decades, the United China adhere to the analysis of the technology of key technology, the use of advanced technology and equipment, development of special test equipment and special equipment development, such as steam turbine, gas turbine, compressor, turbine pump, valves and other large machinery, machine testing device, large heat treatment device, large parts of welding equipment. In the aspect of solving hundreds of tons of heavy plant crane lifting capacity, super large equipment base, special structure design and corresponding utilities and other special technical problems to overcome many difficulties, reached the international advanced level.