Planning itineraries; Shanghai, Suzhou, Ningbo, Hangzhou

Hi, I will be landing in Shanghai for 12 days. We also want to do some excursion outside Shanghai as well, those 4 cities listed above, where we want to see. Would be nice if anyone of you can advise us. Which way of city arrangement would be easier for us to travel from town to town. Shanghai--> Ningbo-->HZ -->Shanghai-->Suzhou? Is this way easy with the trasportation? thanks in advance.