hello elisa, there is a government run travel at the station as soon as you come out of the ticket checking you can find it its the better one, they take to7 places in a day they charge you around 125 i am not sure about the price its worthy. and safe. you will be joined by more people (Chinese) and the guide will be chinese.

if you join the government tour agency you may pay much than you traveled by your self or than you did with tour guide. and it would be with the scheduall . so how many days will you stay here in china . if you have a long time trave you can start travelling by train is better and go many citys