Travelling from Sydney Via Pudong to Seoul Korea (Round trip)

Hi. I leave sydney to go to Seoul but I transit through Pudong Airport which Arrives: Fri 11 Nov 11 19:20 and Departs:Sat 12 Nov 11 08:20. 11 hours. I have a New Zealand Passport and my partner has a South Korean Passport. We will be leaving the airport during transit and given a hotel to stay in by China Eastern Airlines. Do we need a visa in this case? thank you.