cost for SHA to Huangpu River area and back to SHA at night.

I arrive at Shanghai Hongqiao International Airport around 11:00PM. My connecting flight to Japan is on next day morning. So Im thinking of going sightseeing (to take some pictures ) during that time in a Taxi.
How much will it cost me if I go to Huangpu River area (stay there for 1hr ) and come back to SHA air port back ?

If you have any other ideas please let me know that too.

THank you.