Moganshan 2008
One of the nicest places around Shanghai is Moganshan (Wikipiedia article here) - a mountain near Hangzhou where we rented a house for the 2008 summer. We didn't have much time to spend there, but I got up 5-6 times.
There are those that say the mountain's name means never dry, and they have a point - it's a lovely but wet place.