WYOMINGPILOT summed up the situation very well. The CAAC are strict on many things, and can also make arbitrary demands for extra tests (or simply deny a medical) to protect their own jobs. Much of their BS would not be tolerated outside China.
I have seen the CAAC micromanage the local doctors, forcing them to pull medicals or do extra tests on foreign pilots. If you get an airline job in China, save your money and do not expect job security.