There are multiple phrases that can be used[1]

1 - https://github.com/dom96/KillSwitch/blob/main/SPEC.md#abrupt...

Alternatively, this might accurately identify Chinese models so you can avoid them if that's your goal

Personally I don't have much interest in using models that blatantly censor historical facts.

Tiananmen Square is an obvious one but I would be concerned that any model that censors that would also have other hidden censorship or more subtle biases I wouldn't catch