Implicit foreign debt can be divided into three types: implicit foreign debt, disguised foreign debt and potential foreign debt. Concealing foreign debts refers to the foreign debts borrowed by domestic institutions from overseas creditors but not registered with the foreign exchange administration department, which is characterized by deliberate concealment; Disguised liabilities refer to debts with contractual repayment obligations that are hidden in various forms and do not appear as foreign debts on the surface, but need to be repaid in foreign currency in essence; Potential foreign debts refer to contingent foreign debts, such as the foreign debts guaranteed by the Chinese side for the foreign party of the joint venture and the debts guaranteed by the domestic parent company for the overseas registered subsidiaries. Those potential foreign debts are invisible foreign debts. That is, invisible foreign debt is a part of invisible foreign debt.