1 When underground bankers receive funds from clients, they divert the money to numerous bank cards under their control and then arrange for the funds to be placed in bank accounts they have opened overseas. If the value of assets is low, the funds will be handled by small underground banks run by family groups.

2 Underground banks often send money to casinos in Macao to be laundered. The casinos then transfer "clean money" to clients' bank accounts overseas disguised as legal winnings from gambling.

3 Money dealers notify their foreign counterparts through instant-messaging platforms, such as QQ and WeChat. Suspects use false documents to simulate business or export activity. Their accomplices overseas then send US dollars to their offshore bank accounts, with the sums based on the daily exchange rate.

Usually, money dealers charge 3 to 5 percent of the value of the assets. However, if the dealers are part of a gang or are involved in other criminal activities, there is no guarantee that the proceeds will arrive in bank accounts overseas.