VSIM3D.VMT.VRsim virtual flight training system indigenously developed by CnTech, primarily by iFSim ® Common software framework, flight simulation modeling module, virtual equipment interaction module and system control software. The system is based on the VR hardware platform and is capable of achieving VR flight under multiple aircraft types and missions. The supported aircraft types include: fighters, bombers, transport aircraft, AWACS aircraft, helicopters, trainers, carrier based aircraft and UAVs, with options for multiple missions including: long duration flight, night flight, high-altitude flight, maritime flight, plateau flight, complex weather flight; The system contains the United Flight software, which can be online to achieve single, dual, formation, air combat training.