Due to economic, political and cultural exchanges and contacts, money and capital flow between countries and regions. Including international monetary system, balance of payments, foreign exchange market and exchange rate, exchange rate system and foreign exchange control, international reserves, international financial institutions, international financial markets, international capital flows, international debt, international monetary reform, regional monetary union, international settlement, international lending and international financial integration. International finance is closely related to a country's domestic finance, but there are also great differences. Domestic finance is bound by a country's financial laws, regulations and rules, while international finance is bound by laws, regulations, international practices and various treaties or agreements made through international consultation.