China will send Police to arrest you if you threaten the state, like a lot of places. Saying they are a Police state though should take into account how Chinese People perceive the police, and a lot of Chinese people and people living in China have shared that they normally see police as kind of push-overs who get bullied by screaming old ladies, or various other interactions where they think they're restrained almost to the point of impotency.

I mean, the Police problem is really bad in America, it's truly hard to compare to anywhere else. Even in 3rd world nations where the Police are known for taking bribes and using torture, I've had people from Iraq tell me they trusted interacting with their own police more than American cops to not to act like degenerate psychos out to ruin their lives.