He probably does mean that. An environment of censorship very quickly demands meta-censorship -- censoring discussion about the existence of censorship, otherwise you could circumvent the censorship of the particular topic by discussing the fact that it's being censored.
We saw this clearly demonstrated during covid -- discussion about covid censorship was also censored.
"sinofication" sounds a lot like "eliminating the existing culture" which sounds a lot like genocide. Genocide is more than just murdering everyone like in some of the most well known cases like the Holocaust -- it includes elimination of an ethnic group by any means possible, including "nativification"
We saw this clearly demonstrated during covid -- discussion about covid censorship was also censored.