Import lock-in refers to the act of converting foreign currency into domestic currency. According to different purposes and methods, import locks can be divided into the following categories:

1, goods import lock: refers to the behavior of enterprises or individuals to convert foreign currency into local currency to pay for goods import by purchasing foreign exchange from banks. This way of locking foreign exchange is to meet the payment demand of imported goods and ensure the smooth progress of foreign trade transactions.

2. Service import lock-in: refers to the behavior of enterprises or individuals to convert foreign currency into local currency to pay for the import of services by purchasing foreign exchange from banks. Service import lock mainly includes tourism, education, consulting and other service fields. Foreign currency is converted into local currency by purchasing foreign exchange to pay the service fee.

3. Investment import lock-in: refers to the behavior of enterprises or individuals to convert foreign currency into local currency for investment by purchasing foreign currency from banks. Investment in foreign exchange locking mainly includes investment in overseas stocks, bonds, real estate and so on. Convert foreign currency into local currency by purchasing foreign exchange for capital investment and operation.

4. Foreign exchange locking in capital input: refers to the behavior of enterprises or individuals to convert foreign currency into local currency for capital inflow by purchasing foreign currency from banks. Capital input locking mainly includes foreign direct investment, overseas borrowing and equity investment. Foreign currency is converted into local currency by purchasing foreign exchange for capital investment and flow.