Hours for Round trip from Xi'an Railway Station to Huashan?

Dear, if you want to make a round trip in a day, you are suggested to take the bullet train departing at North Railway Station. The duration is about 30 minute - 1 hour. Then you can take the free bus or taxi to the scenic area, about 15 minutes' ride. On your back trip, the bullet train are available until 22:00. So this is the best way for you to make the round trip.

From the XA railway station to Huashan, you need to get the only morning bus departing at 08:00 and the back-trip bus will depart at 17:00. You have to take the cable car to visit the mountain to make sure you can catch the last bus.