Hi, what is the number of a bus to Westin Hotel? How to recognize it?

Do you refer to the shuttle bus from Xianyang Airport?
If yes, there is no direct airport shuttle bus. Upon landing, you can take North Railway Station Line and get off at North Railway Station first. There are detailed English signs at the airport that you can easily find the boarding site of this bus line. Then take metro line 2 to Xiaozhai Station, Exit F. After arriving, take public bus no.24 to the South Square of Big Wild Goose Pagoda. Walk southeast around 250 meters to find the destination.