Money laundering means that criminals transfer illegal funds through a series of financial accounts in order to cover up the source of funds, the identity of the owner or the ultimate purpose of using funds. Illegal funds that need to be "laundered" may usually be related to terrorism, drug trafficking or organized crime. Money laundering is literally translated from the English word "money-washing", and the language expression of its image records the origin of the word: at the beginning of the 20th century, the financial director of an organized criminal gang headed by Ali Capone in Chicago, USA, bought an automatic washing machine to wash clothes for customers, and then adopted the method of mixing eyes and pearls. The income from washing clothes is mixed with the proceeds from crime and declared to the tax authorities, so that illegal income and assets can be put on a legal coat. Money laundering in the modern sense refers to the act of concealing and disguising the source and nature of funds through various means and financial institutions, so as to legalize them in form. The subject of money laundering crime is financial institutions or individuals, and there are five acts: (1) (2) helping to convert property into cash or financial instruments; (three) to assist the transfer of funds through transfer or other settlement methods; (four) to assist the remittance of funds abroad; (5) Concealing or concealing the illegal proceeds of crime and their sources and nature by other means. "