I just managed to get a friend to scan my Chinese visa in my expired passport at home while I'm on the road on my next trip.
I need this to show when I apply for a multiple entry visa to China in a few weeks as they require evidence that I didn't overstay on two previous visits to qualify for the broader visa.
On the scan I note that there is only one stamp from China immigration, on the page facing the Chinese visa. The date is for the time I exited on my second visit of that double-entry visa.
It's within the realm of possibility that China only stamps a passport at the end of the last visit the visa is good for. But I assume there are probably two entry stamps and one other exit stamp on another page. Is this a correct assumption or do they actually record some of the entries and exits just electronically? (I know Australia doesn't stamp passports any more and does it all electronically, for instance.)