Originally Posted by
ograff
Some places I've looked say 24 hour TWOV does not require country C, but I can't tell for sure. If not, could I travel if I don't plan to leave PVG (ie just spend the night in the airport).
Hm, where have you looked?
I have not been actively looking, so it's possible that something has changed, but unless something has changed, you will not be allowed to board the plane without a visa or proof of TWOV. Never mind the Chinese, airlines in America don't want to pay the fine ..... and staying at the airport has not been an option in the past.