Originally Posted by
appleguru
Us passports should be OK without a visa AT PVG for 144hrs as long as you have a ticket for a flight departing PVG within that period.
WRONG. China must be transit, meaning that if you arrive nonstop from the USA, you must depart on a flight that first lands is a different country, where Hong Kong, Macau, and Taiwan are all considered to be separate countries for this purpose.
There's an excellent and extremely informative thread with wiki on this in the China destination forum.
Also, good luck on having DL allow you to board without a Chinese visa even if your itinerary is TWOV compliant.