There are specialists who say that the YUAN is going to replace the dollar, what would happen with the cryptography if that happens?
The reason that dollar is even used in the first place as the first point of contact to exchange bitcoin to fiat (firstly dollar maybe before conversation to other fiat) is that dollar is accepted global as a trading or exchanging currency otherwise, dollar wouldn't have been used to convert bitcoin.
Therefore, any fiat currency that would replace dollar would be that which is generally accepted globally for trade, exchange and otherwise, including the YUAN.