Please remember that communism calls for the abolishing of the traditional money system.
What you say is good i.e. making all of them use a single method of money transaction but all of them should be brought under the same name and leadership.
The second step would be combining the Chinese Reminbi currency and the being-implemented "Social Credits" system to bring to effect a new communist economic system like one proposed by myself in this thread.
You need to first understand the difference between communism and Leninism.
