Advanced Regional for 21st Century passenger aircraft is China in accordance with international standards developed with independent intellectual property rights of aircraft. ARJ21 includes basic models, freight and business models and other models.ARJ21-700 type passenger aircraft can carry 78 to 90, the standard range of full flight range of 2225 km, mainly to meet the requirements of the use of radiation from the central city to the surrounding small and medium cities. The maximum takeoff weight of 40500 kg, the maximum height of 11900 meters, the maximum range of 3700 km, the design of economic life of hours of flight hours /20 calendar year.and 1,2,3 is light???.