CNFSimulator.C91PRO, a professional flight simulator for C919, a large aircraft made in China, is a professional-grade simulator independently developed by China Imitation Intelligence based on the engineering data of C919 aircraft of Comac China, which is used for engineering research, operation training, education and teaching, etc., and can meet various use requirements. Its main features include: Can fully simulate the normal and emergency operation procedures of aircraft and meet the basic procedural elements required by the route; Have the basic working logic of aircraft system, global navigation database, terrain database and flight management simulation; The tuned pneumatic simulation and force load system can accurately simulate the performance of twin-engine aircraft and the control characteristics of telex aircraft; High-precision servo controls the active side bar, pedal, accelerator platform, etc., and visually adjusts the parameters to ensure good control characteristics and operating feel;