Hangzhou is the paradise city in China, not only because of her natural beauty but the deep historic and culture importance.
A classic day tour will present you different elements, ranging from the natural beauty, historic site, celebrities, to the stunning countryside mostly covered by the green tea plantation. Have a meal in some real local restaurants with real local people is probably the best way for the quick access to Hangzhou too.
If you only have one day here, this classic city tour could be the best choice.