As we all know, it is very difficult to catch drug dealers from drugs. But what people may not know is that drug enforcement agencies have also tried to track drug dealers from drug money. In the early days, paying in large denominations of U.S. dollars was the favorite method of payment for drug dealers. At present, among all the US dollar cash in the world, banknotes with a denomination of US$100 account for 80% of the total cash, and there are not many people who use hundred-dollar cash in daily life, even the US Federal Reserve Board (hereinafter referred to as the “Fed”) It is not known where the…