I will arrive at shanghai pudong airport at 18.55 and need to buy a train ticket to Jinhua

I will arrive at shanghai pudong airport at 18.55 and need to buy a train ticket to Jinhua leaving from shanghai south train station. Where can i buy the train ticket other than the train station itself. Can i buy from the airport itself or longyand road maglev station? the train i want to catch departs 2 hours after i arrive, so the quicker i can buy the ticket the better. I arrive on the 13th October at 18.55 at pudong airport, maybe someone can help and i would reward for the help. Thank you