Travel Itinerary after the training in Hangzhou

We are going to HZ for training from 17 upto 21 June 2013, but we want to have
an sight seeing around the city, before the training session or after the session.
We need your advice of flight schedule at effective way and economic rate.
1. I want to see Hongkong, Shanghai, Beijing, Guilin, and other suggested good areas to see