Without supervision, the currency of poor countries is worthless, and poor countries can only exchange their exports for the currency of developed countries, and then use foreign currency to buy products from other countries.

Just like China, before the reform and opening up, when we went abroad, RMB could not be used at all, and only US dollars could be used. Now RMB can be used as US dollars in neighboring countries. It is precisely because the country is rich that the RMB has become a sought-after international currency.

However, China's RMB is not issued at will. The People's Bank of China issues RMB according to foreign exchange income, and once the imported goods are paid in foreign currency, the RMB amount will be recovered accordingly.