can you tell me what is best option from xian to shiyan.

There are train and bus service.
The train ride is about 5 – 6 hours, and the fare is CNY107.5 – 130 for the hard sleeper.
In the Provincial Bus Station (opposite the main railway station) and Sanfuwan Bus Station, there are buses going to that city, too. The ride is about 5 hours and the fare is about CNY129. The bus will take the high-way, through the tunnels in the mountain. It will not run in a round way.

what time interval the bus from XIAN to Shiyen and back thank you
artyeo

You are suggested to take direct coach from Xian Fangzhicheng Bus Station. The bus schedules are 09:20, 11:50 and 14:20. The ticket fare is CNY 79 per person.

The return schedules are at 10:00, 12:00, and 17:00.

Where is the Bus Station in SY? Is there any bus to Wudangshan bus station ( Location ) ..

Hey, the buses arrive at SY Express Bus Station on Kaixuan Avenue, Zhangwan District. For Wudangshan, city bus no. 202 directly leads there and it can be taken at SY Railway Station.