$ is the symbol of the US dollar, whose currency code is USD, which is the legal tender of the United States of America. It can be divided into banknotes and coins, in which banknotes are 1 USD, 2 USD, 5 USD,1USD, 20 USD, 50 USD and 100 USD; Coins are 1 cent, 5 cents, 1 cent, 25 cents, 50 cents and1dollar. Conversion relationship: 1 USD = 100 cents. The competent authority of RMB issuance is Congress, and the specific issuance business is handled by the Federal Reserve Bank. Federal Reserve Bank-generally refers to the Federal Reserve Bank in the United States. Its functions are issuing currency, acting as an agent for the national treasury, regulating currency circulation, supervising private banks and managing finance, and organizing bill clearing. Convertible into USD and RMB: 65438+ 18 2020 10 month, 1 USD =6. 4804 RMB, RMB 1 ≈0. 1543 USD. Subject to the transaction price at the bank counter. When users exchange dollars, they must choose the exchange rate that is beneficial to them, so that they can exchange more dollars with less money. Many domestic banks exchange US dollars, such as China Bank, Industrial and Commercial Bank of China, Agricultural Bank and other large commercial banks, which exchange US dollars from Monday to Friday, but generally do not accept currency exchange on weekends. If the exchange amount is large, you'd better make an appointment in advance, otherwise you can't exchange it smoothly in advance. The method of expanding data to judge real dollar 1. Handfeel judgment: the front and back of the component will have obvious roughness; 2. Needle picking judgment: a thin red and blue line can be picked out in the far blank; 3. Wipe judgment: wipe the white paper on the right side of Yuan, and there will be obvious color marks on it; 4. Texture judgment: when you play the dollar by hand, you will hear a crisp sound, which is very bright; 5. Color judgment: Yuan will be printed with special color ink, and the period will be very clear; 6. Portrait judgment: Yuan's portrait lines are smooth and clear, and his expression is full. Dollar banknotes in circulation are all versions of banknotes issued since 1929, mainly Federal Reserve banknotes. The denomination of banknotes is 1, 5, 10, 20, 100 yuan, and the denomination of coins is 1, 5, 10, 25 cents. The monetary units in the United States are: US dollar ($), US cents (