Do all passengers need to be present to pick up tickets in China? At Xi'an airport?

I have booked tickets for my wife and me to go from Xi'an to Chongqing. Two questions:
1. Is there a place to pick up the tickets at the airport?
2. I will be arriving several hours ahead of her. Can I get both of our tickets or do we both need to be present in perso,n to pick them up?