The rail transit line M2 will stride the Yellow River in the north.

　　The second round rail transit construction planning (2016-2023) and the comments on the planning impacts to the environment have been published on April 12th .Compared with the information published previously , specific adjustments and optimizations of the lines have been published this time , 4.3 km of Line M3 which was planned to be underground totally are now adjusted to be the viaduct in order to protect the springs. Besides, Line R2 will be separated with Line M1 after the first phase adjustment and its orientation also has been adjusted. The second round planning of the rail transit includes loop lines, Line M1-M4, the north extension of Line R1, R3 and the west extension of Line R2 .