ARJ21, short for Advanced Regional Jet for the 21st Century, is a new type of turbofan short/medium range regional jet that is designed and manufactured in China with our own independent intellectual property rights. The range of the standard ARJ21 is 2,225 km, which is mainly for meeting the operation requirements of hub-spoke routes, ie from central cities to neighboring medium and small cities. The maximum takeoff weight of the aircraft is 40,500 kg, the maximum operating altitude 11,900 m, and the maximum range 3,700 km. Two CF34-10A engines are mounted on the rear of the aircraft. There are 78 seats in a dual-class configuration and 90 seats in a full economy class configuration. Its economic life is designed to be 60000 flying hours/20 calendar years.