Originally Posted by
dvs7310
It's bad advice because you must be transiting to a "3rd country", not returning to the same country in which you originated.
Going LAX-PEK/PVG-HKG with no visa, no problem
Going LAX-PEK/PVG-LAX with no visa, and it's a no go
This has been my experience as well. Lots of information at
Shanghai / PVG Transit Without Visa.