location of the train ticket office in Chongqing Airport

Hello,
I plan to exchange my e ticket(CRH train) for paper ticket at the train ticket office in CQ Airport, but I don't know where it is (only know that it locates at the domestic terminal .

Please tell me the exact location of the train ticket office in the Airport.
Please also tell me that how to find the subway station at domestic terminal of the Airport.
Thank you