There's a fine line between cartoon-villain evil, exemplified by people like Kim Jong Un who just doesn't seem to give a fuck, and just-enough-to-achieve-your-objectives-but-not-enough-to-make-too-many-people-notice evil, which is what China is aiming at.

Lots of people travel in and out of China with all sorts of computing devices. China does care about the reputation of their root and of their highly profitable electronic exports.