You can get off the plane and take a taxi to the railway station, probably from 25 yuan to 30 yuan (it seems that you are not allowed to set your watch now), and then take a bus to Baotou at the bus station in the west of the railway station (you can see it next to it, don't run to the West Bus Station). Soon, too, an hour and a half.

The fare seems to be around 30 ~ 35 yuan, because I have never been there.