China's independently developed ARJ21 regional aircraft has served 1 million passengers as of July 20, said its developer the Commercial Aircraft Corporation of China (COMAC) Tuesday. The ARJ21 is China's first turbo-fan regional passenger jetliner model and is designed with 78-90 seats and a range of 3,700 km. It can fly in alpine and plateau regions and is adaptive to various airport conditions. To date, the COMAC has delivered a total of 33 ARJ21 airplanes to its customers. They are serving on air routes linking 56 cities.