1. The foreign exchange reserve surplus is mainly in five Asian countries and regions, such as Singapore, Malaysia, South Korea, Taiwan Province Province and Hong Kong (see the list of foreign exchange reserves of various countries);
2. Foreign exchange surplus of natural resources export, including foreign trade surplus of natural resources such as oil, natural gas, copper and diamonds, mainly represented by Middle East and Latin American countries;
3. Relying on international aid funds represented by Uganda Poverty Alleviation Fund.
4. Issue special government bonds, represented by China.