How to go wuhan airport from rail station?

hello, i m living in xinyang, henan. i will come wu han at 26 feb at 2200 hrs by train and i have flight on 27 feb at 0700 hrs from tianshui internationl airport to Sanya. i have 3 questions.
1. Which rail station is the closest to tianshui international airport?
2. how i can go to tianshui international airport from that closest rail station in cheap price at 2200-2300 hrs?
3. if there is any bus at 2200-2300 hrs, then which bus and from where?