2017 Year,
China banned fiat currency trading virtual currency,
BTC ->CNY and CNY -> BTC, Illegal trading on the exchange.
However, user A and user B can seek guarantee from the exchange, and user A transfers money to user B.
CNY(UserA) -> USDT(UserB),USDT(UserB) Exchange Buy BTC, ETH,...., OK
BTC(UserB) Exchange Buy USDT, USDT(UserB) -> CNY(UserA) OK
2021 Year,
It is illegal for the exchange to provide services to the Chinese!
There is a high probability that there is no way to bypass
--------------------------
Translated by google, I don’t know if I can express it clearly