Just came back from a 4 days trip in Shanghai 2 weeks ago. Benefitted alot from my research on online websites like Travelfish etc.
I had a very relaxing schedule and anyone could easily squeeze the places I visited into a 3 days trip.
Below is a short video of my 4 days trip, I hope you will find this useful. https://www.youtube.com/watch?v=gYUjpwrQlc8