how do we go to hangzhou from shanghai? what are the best hotels in hangzhou?

You are suggested to go to SH Hongqiao Railway Station to take a high speed train to Hangzhou in around an hour!

Personally speaking, the local West Lake Four Seasons Hotel is the best one. It lies just at the bank of the lake, so you can have a great view of the West Lake scenery! Also the transportation nearby is very convenient!