All I can say is that a fairly recent Turkish stamp was not spotted on several entries until last week. There was some consternation, and a couple of questions in Chinese about the time spent in Turkey and the purpose of the visit. Not really a big deal, but nonetheless a really big surprise to be asked at all about the Turkish stamps when entering China. (There were two immigration officers in what seemed to be a trainee-trainer situation, and it was the trainer who spotted the Turkish stamp.)
I'm late to this thread. What's the issue with Turkish stamps when visiting China? Sino-Turkish relations at a low point?