There is ethnic cleansing in Xinjiang in which China has piggy-backed on the US "war on terror" as an excuse to repress muslim population.

There is not. There are no hallmarks of an ethnic cleansing nor evidence for one. The think tank propagandists behind these claims - they are all in the same funding networks connected to the NED/USAID - spent ages just trying to shoehorn what was actually happening into a wishy washy definition of "cultural genocide", which is to say, there is no mass death, no mass expulsions, no attempt to eradicate the population in any way.

Re: "cultural genocide", even with a wishy washy definition, that is also specious, as Uyghur culture has not been disrupted or banned. The exact opposite is the case, it is lifted up culturally, promoted materially. What is oppressed is anything in the neighborhood of salafism, which has never been part of Uyghur culture, but in their infinite (islamophobic) wisdom, the western pro-think tank critics have conflated it with Uyghur culture simply because they are largely muslims.

And you have, yet again, uncritically accepted the liberal propaganda narrative against the designated enemies of the US state. Are you noticing the pattern? It seems you are more interested in living in a fantastical liberal bubble than ever acknowledging that "the tankies" actually can defend their ideas while you cannot.

This is officially called "Strike Hard Campaign against Violent Terrorism". Do I really need to say more?

Yes, you do. You can of course understand almost nothing about this from that title. I would challenge you to tell me what you think it means and what is going on in your thought process.

Taiwan has its own democracy and wants to be independent, yet China claims it as its own.

A few days ago I broke this down for you and you ignored it entirely. If you deigned to read what others told you, you might understand the basics of the detente with Taiwan.

Yes there's asterisks and details and questionable involvement from the West in all of this, but these aren't "myths".

The content of both claims are, in fact, mythological. In the first case it is very literally the propaganda outfits of CIA cutouts and the promotion of some expat grifters working together in an absurdly lazy information war. In the latter case it is a false pretense of having no idea or way of knowing what the tension is over Taiwan and opting to present it in an intentionally vague way to put it in a worse light while also using a liberal framing re: praising it as democratoc, whereas any anarchist will not uncritically celebrate bourgeois electoralism, and certainly not in defense of an ethnocentric state. Taiwan did actually do an ethnic cleansing, which is ironic for your case.

Sinologists from various countries have stated that they or their colleagues have been barred from entry or held by authorities for weeks because of what they've said about China. For example I just heard Weigelin-Schwiedrzik say this on a marxist podcast.

Literally who cares.