I hate to be the bearer of bad news...
I looked into this a couple of years ago and there is no chance to fly a lighty in shanghai airspace (unless its all changed).
Most airspace in China is off limits to GA. However there are some places that do have flight schools but even then you have to book a flight slot in advance and if the wx is crap or the controllers decide that the traffic is looking iffy they'll not give you clearance.
Please feel free to do some research though, it may have all changed.
If you find anything new post it as I'd be keen to know.
Shanghai is awesome even without the flying, plenty to see and do. Can't wait for my next trip there.