It's effectively totalitarian, special economic zones aside. We've seen what happens if they try to stir the pot politically. Their relative "freedom" is exercised with a guillotine permanently above their heads and no legal rights.
Everyone is surveilled across every arena of life.
And if you really think people only disappear in Xinjiang, look at the history (and continuing present) of human rights or democracy activists. [0]
[0] https://www.hrw.org/news/2019/05/30/human-rights-activism-po...