I second everything that Fermat posted. Shanghai is a wonderful tourist destination and as close as you'll get to seeing where this century is heading.
Vibrant, exciting, stunning architecture, great day trips from the city and friendly folks.
SHanghai Museum, Nanjing Road, go up to the roof of Peace Hotel and look over the Bund/HuangPo river at night, walk along the river at night. Take boat trip along Huanpo - pretty spectacular. Go to show at National Theatre - stunning building.
As Fermat suggested, the gardens in Suzhou are fantastic - even better, take the train out to Hanzhou and spend a few hours walking around the West Lake.
Go, Go, Go!