Is it possible of going saturday 21st sep from Suzhou to Zhouzhuang in early morning spend half day there and then go directly from Zhouzhuang to Shanghai and sleep there or will i have to sleep in Zhouzhuang and then early morning i go to Shanghai on sunday? Which would b possible

1) Is it possible of going directly Suzhou - Zhouzhuang - Shanghai on same day or do i have to return back to Suzhou to go to shanghai?
2) What time would be d last bus leaving from Zhouzhuang to Shanghai to make it on same day?