Telling the truth, also called "beautiful knife", is the same as RMB. It is a concept that all corners are called RMB. Also known as the US dollar, when the Federal Reserve issued US dollars long ago, one dollar corresponded to one kilogram of gold reserves to maintain the strong momentum of the US dollar in the international market. The following is an introduction to the US dollar, which is the official currency of the United States of America. At present, the US dollar banknotes in circulation are all the banknotes issued since 1929. 1792 appeared after the passage of the American mint act. At present, the issuance of US dollars is controlled by the Federal Reserve system. Starting from 19 13, the United States established a federal reserve system and issued federal reserve bonds. More than 99% of the banknotes in circulation are federal reserve notes. The competent department for issuing US dollars is Congress, and the Federal Reserve Bank is responsible for the specific issuance business. After World War II, the United States forced major European countries to agree that international monetary settlement must be settled in US dollars, so the US dollar was widely used as a reserve currency in countries outside the United States. The dollar is the basic currency in foreign exchange, the main currency in international payment and foreign exchange transactions, and occupies a very important position in the international foreign exchange market. Hope to adopt, thank you!