Financial innovation represented by virtual digital currency and payment innovation, while facilitating financial transaction, also gives rise to the phenomenon that has an impact on the legal status of the RMB. Regardless the kind of transaction and the financial innovation that would appear in the future, the national sovereign currency RMB is still the most basic form of transaction, but also China's only legal tender currency. The issue of currency involves both law and finance, where market ambitions cannot be allowed to take over the regulatory system.