Take bus 1 from the railway station (you can see a bus stop at the exit on the right side of the railway station, that's it) and get off at the west station. Just change from Xiguan to 3 10/3 or 103. There is a special station called Jiaotong University. You can also take other buses from the railway station to the west station, such as 3 1. It's about 30 yuan by bus.