On top of all that China doesn't even have 50% of the hashrate in total all around their vast country.
Not sure what's your source for this information but it's actually wrong, the fact is, China does have more than 50% of the total hashrate, in 2020 china had over 70% of the hashrate, it has probably declined since then and I have not looked into it for a while but I am pretty positive that even at this stage with all the "mining ban" going on China is still "very easily" controls more than 50% of the hashrate.