Hi! I need information for tickets between Capital Airport T2 and Main Railway Station.

Do you wanna take the AE to get to the Main Railway Station?
If yes, take it to get to Dongzhimen Station first. Then transfer to subway line 2 to arrive at the destination directly.
You don't need to purchase the AE Tickets or subway tickets in advance. Just buy them when you arriving at the airport/station. There are many schedules every day. And the ticket counters are easily to be found. :)