Use private accounts to accept customers' RMB instead of US dollars, and don't link the customer list with the interbank market, so that customer transactions are just a number game. The money invested by customers at a loss will naturally not be claimed by customers, and the money deposited in private accounts will become the "owner" of the black platform.
Black platforms must make customers lose money as a whole, otherwise the "owners" will lose money. In China folk forum, there is a folk saying called "gambling", which refers to the mode of "you lose and I win, you win and I run" on the black platform. There is no supervision on the black platform, just like playing dice without a referee. He can take out a remote control dice and let you lose everything.
The natural enemies of the black platform are not only regulators, investor protection agencies and local public security departments, but also trading experts and professional trading companies.