In countries with strict foreign exchange management, it is generally stipulated that exporters must settle and sell foreign exchange at banks designated by the state, that is to say, exporters must declare the export price, currency used for settlement, payment method and time limit to foreign exchange management agencies. After receiving the export payment, you must declare to the foreign exchange administration department and sell all or part of the foreign exchange to the designated foreign exchange bank according to the official exchange rate and management regulations.

According to the relevant laws and regulations of our country, the circulation of foreign currency is prohibited in People's Republic of China (PRC), and settlement in foreign currency is not allowed, unless otherwise stipulated by the state, so if otherwise stipulated by the state, you can buy things in US dollars.