The main forms of capital flow obstacles are foreign exchange control, floating exchange rate and restricting the remittance of investment income.
Foreign exchange control: refers to the restrictive measures taken by a government to balance the international payments and maintain the exchange rate of its own currency.
Floating exchange rate system: refers to a system in which the exchange rate of a country's currency is not fixed, but is determined by the relationship between supply and demand in the free market.
Investment income: refers to the economic benefits obtained by enterprises' investment. Investment income includes dividends received from foreign investment and bond interest received, as well as the difference between the amount obtained by recovering investment at maturity or transferring creditor's rights before maturity and the book value.