Originally Posted by
nologic
Nothing to be scared about. The Chinese Immigration officials are very up to speed about this. Just show proof of your onward travel within 48 (now 72) hours, and they will escort you to a central desk where an officer will check with the airline or something and stamp your visa. You will be past security before your bags come out. It's very perfunctory.
The only potential problem is with your airline not being aware of the exemption. Most of them are...Bring the print out and stand your ground and they will find someone internally who has a clue and clears you for travel/boarding. Have a good trip.
Thank you so much.

You're sure that me coming into Shanghai on one airline (Cathay Pacific) and leaving Shanghai on a different airline (American Airlines) isn't an issue? The woman on the phone at the New York Chinese consulate just now seemed to think this was a concern, but wasn't sure. Everything I've read is that it isn't a problem, but I don't want to take any chances!!!