The military industry chain mainly covers the nuclear industry, aerospace, aviation, shipping, weapons, electronic information six major business areas. Military electronics industry is mainly responsible for supporting the role of weapons and equipment, the industry chain is concentrated in the middle and upper reaches of the military industry chain, midstream link communication equipment, radar, infrared equipment, is an important subsystem of the military electronics machine; upstream link is divided into electronic components, integrated circuits, PCB, embedded computer modules, microwave devices, connectors, etc., is the cornerstone of the development of information technology equipment. The heart of the military aircraft is the aero-engine, the aero-engine mainly contains the whole plant, control system, raw materials, components and so on. Among them, the control system is the core system, containing many hydraulic components, such as engines, servo systems, control chips and so on.