Here is the tour I planned last year in April: Hangzhou - Xitang (a water town in Jiashan, can be reached by bus from Hangzhou East BUs Station, 2 hours)- Shanghai (back to Jiashan Bus Station from Xitang and then take bus to Shanghai there. It seems Xitang has direct bus to Shanghai)- Suzhou for the Private Garden and wedding dress street in Tiget Hill-Kunshan to visit my friend and then take bullet train back to Shanghai, then leaving from Shanghai back home.