is there a bus to Han Yan Ling from the center of Xi'an???

I just know local tourism bus line 4 operates from XA Public Library, which can be reached by subway line 2, to Han Yang Ling! Buses are scheduled at 08:30, 09:30, 10:30, 12:00, 13:30, 15:00, 16:00 and 17:00. For back trip, buses leave at 09:30, 10:30, 12:30, 13:30, 15:00, 16:00, 17:00 and 18:00.