Stopping over in Guangzhou for 14 hours, valid Australian passport.

My friend and I are flying back from our holiday in Europe. We have a 14 hour stopover in Guangzhou airport before heading home to Melbourne, Australia. We'd like to leave the airport and get a room at the airport hotel so we don't have to be at the airport for so long. We both have a valid Australian passport. Are we able to leave the airport without any other visas or permits?