I’m surprised iMessage worked for me while I was there. I wonder what consessions Apple had to give for that?
From the article:
'Other services provided by American technology companies are available in mainland China. The country tolerates Microsoft’s Skype service for phone calls, which does not provide end-to-end encryption and as a result is easier for governments to monitor. Beijing also allows Apple’s FaceTime service, which has end-to-end encryption but does not have a WhatsApp-like feature allowing users to exchange secret codes — letting WhatsApp users combat what are known as “man in the middle” attacks.'