The Nanjing Museum is a wonderful place to spend a lot of time. I got stuck in a most fascinating art (contemporary painter)show that I spent two days there...in just the show. So be sure to check out the temporary exhibits as well as the permanent collections. Also, the book store is a wonderland of books on Chinese art and I bought many volumes which will never be seen in the US. Additionally, there is a very lovely, quiet, air conditioned lunch, tea, ice cream parlor right next to the Museum.

This applies to all the major cities in China. The best food in China comes from the local street vendors or small resturants. They are usually cheap and delicious. Do not go to well established posh looking resturants. My experience usually tells me that they are either too westernised or too unsuited to my taste. However this is my opinion and the choice is yours. But then you didn't go to China to have a ham sandwich or a salad did you?