Hi...

I would be in China from 3th April ( from spore & land midnight at hangzhou) to 10th April ( Midnight flight back to spore). I would like to visit suzhou, nanjing and shanghai.
Shanghai will be the last destination before i fly back to Singapore. I need 3 full days in Shanghai which would be from 8th april morning.
Do u tink i will have enough time to visit suzhou and nanjing since i only have 4 days left?
From hangzhou, should i go to suzhou-nanjing-shanghai or nanjing-suzhou-shanghai?
And what is a 'must see' in suzhou and nanjing?
Thanks for your advice.