The crime of illegally operating foreign exchange refers to the act of individuals or organizations engaging in foreign exchange trading without the approval of relevant state departments and in violation of state regulations on the foreign exchange market. This kind of crime mainly involves illegal acquisition of foreign exchange income in violation of foreign exchange management laws, regulations and policies. Concealment crime refers to the act of individuals or organizations deliberately concealing, covering up or forging facts in order to avoid legal supervision or gain illegitimate interests in economic activities. In foreign exchange, the crime of concealment may involve false reports, forged documents, concealing transaction records and other means to cover up illegal foreign exchange operations. The difference between the crime of illegally operating foreign exchange and the crime of harboring is that the crime of illegally operating foreign exchange mainly focuses on illegally operating the foreign exchange market, while the crime of harboring focuses on deceiving and concealing economic activities. The crime of illegally operating foreign exchange is a direct violation of foreign exchange management laws and regulations, and the crime of covering up is to cover up illegal acts by deception. Both of these crimes are illegal, but they are different in nature and means.