The whole journey is about 222: 1 km. Drive 20 meters south from Datong, turn left into G 109, drive 180 meters, enter Yongtai South Road, drive 1.4 kilometers, turn right into South Ring Road, drive 1.0 kilometers, cross Haohai International Hotel on the right, turn left into Dewey Avenue, and drive towards Dewey Avenue and Beijing. Go straight into Dewey Avenue for 840 meters, turn left ahead into Jingda Expressway for 2.9 kilometers, go straight into Erguang Expressway for 7.6 kilometers, slightly turn left into Jingda Expressway for 30.4 kilometers, go straight into Xuanda Expressway 137 and 1 kilometer, slightly turn right for 330 meters in the direction of G7, and slightly turn right for 865438 in the direction of Beijing.