1. buy a guide book
2. read it (not necessarily cover to cover; just try to develop a decent understanding of your options)
3. try to figure out where you want to go
4. buy a plane ticket (into Beijing, out of Shanghai works for most people in your boat, but you might find that your interests are different)
5. if have specific questions at any point, feel free to post them here

however, regarding #5, it is expected that you do some legwork on your own before seeking advice on ft.