LoL , the title mentioned "it's clear now" then you ask they have higher rate or not?
They have big portion of bitcoin for sure, their trading volume btc-cny always be the highest value, at least mostly.
Since, Chinese people out of business, the biggest trade currency switch to Japan yen.
China hold maybe quarter of total bitcoin in circulation, I guess, because they have the biggest mining pools, mining farms and most mining hardware such as antminer s9 produced by Chinese people.