Welcome to Flyertalk!
Much information about transiting in CAN is found in this thread and the thread linked there:
http://www.flyertalk.com/forum/china...hours-can.html
a) you won't need anything else but your passport
b) you baggage
should be checked through to your final destination, but you'll find out as soon as you check in ...
You need to go through transit immigration (your passport is stamped) and exit China again. No problem, transfer takes less than 1h. You must not leave the airport (apparently).