Thanks to all for their helpful comments here! I, too, am writing about the visa-free policy for <48-hour transit thru Pudong/Hongqiao. It's clear to me at this point that it's legal/possible. I'm a US citizen, flying from Moscow through PVG on my way to Hong Kong with a 46 hour layover. But upon arrival at PVG, where do I go if not Immigration? Is it clearly marked where people can receive Landing Cards for such visits?