China money changers in Korea basically trade by transfer. Although it is a crime to exchange money through transfer, it provides great convenience for China people living in Korea. In the process of transfer, not only Korean bank accounts but also RMB domestic bank accounts are needed for transfer.

So some money changers borrow domestic bank accounts from people around them and use them in money exchange business. But recently, when some money changers were banned by the South Korean police, the owners of domestic bank accounts were also investigated.