I think we have bigger fish to fry closer to home when it comes to preserving whatever versions of democracy we have. We’re not going to effectively fight China when we do so much business with them, and a war would be catastrophic. Meanwhile if you care about freedom and democracy, the (re-)rise of populism, and even fascism seems like something we are capable of fighting.
If we want to change China in the long term, we should probably get our own houses in order so that we can actually occupy the moral high ground. Sweden, Germany, Italy, France Austria, the UK, all have either slid hard to the Right, or have flirted with the likes of Marine Le Pen, Lega Nord, Alternative For Germany, and so on. Then you have Hungary and Poland going fully off the deep end, and oh yes, Trump. All in all our table is full before we pretend thst we have either the political will or leverage to make China change. We might even have to accept that the Chinese people more or less have to fight for change themselves, or not, because we’re too busy doing business with Beijing to worry about their concentration camps.