8 1.2 km. According to the map of Gaode, the total length is 8 1: 2km, and the whole journey takes about 2 hours and 50 minutes. Need 17 station, * * * transfer twice, walk 2232m m. Walk about 70 meters, arrive at Lanzhou University of Technology, take bus 11,cross the station 16, arrive at the east exit of Gannan Road, walk about 550 meters, arrive at the civil aviation ticket office, take the line from Chengguan District to Zhongchuan Airport, cross the station1,and arrive at Zhongchuan Airport.