Free shuttle bus to terracotta warrior and bus to airport

Hi. I'll arrive at the North railway station at 10pm and stay in a guesthouse near the station. I intend to return to the station next morning to buy entrance ticket of Terracotta Warriors (TW). I would like to ask some questions:
1/ Railway ticket and entrance ticket from 2 different dates can be used on the free shuttle bus from the station to TW ? Or these tickets must be on the same date ? Are they also valid on the bus from the TW to the north station?
2/ Do you know the number of the free shuttle bus to TW and the bus to the airport? Thank you.