I have 8 hrs in PVG. I want to experience maglev. My flight leaves early morning 4.

Upon your arrival, follow the clear signs to board the express train (SMT). After 8min, you will reach Longyang Road. Then transfer to subway line 2 to East Nanjing Road. You can spend several hours on the pedestrian street and the Bund which are quite busy at night. Then take a taxi back to PVG to wait and board.