G'Day 'Knox',
As others have said, really t'aint worth it....really.
You'll see MORE from the ground, looking UP!
Seeing as you are staying in the Shanghai area, do yourself a big favour and take the 'Mag-Lev' train to the new airport at Pudan(?)
This machine does something like 435kms / hr - smooth as silk - does the 30km in 8 mins. I reckon 3 min to accel - 2 min 'cruise' - 3 min to coast to a stop. And, cheap as chips, by our $!
Above all, ENJOY your trip - it is indeed, a great place to visit!!
Cheers
Griffo