The exchange rate between the US dollar and RMB will change constantly. For example, it costs 1 USD to buy a bottle of drinks, which is probably 6.5 yuan when converted into RMB; If you need 650 yuan RMB to buy a bicycle, it is about 100 USD.
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The history of the dollar
In 1792, the US dollar formed a currency area in 13 colony. At that time, the United States was only a country with a population of 4 million. By the end of 19, it has become the most powerful country in the world. By the time the First World War broke out in 19 14, the economic aggregate of the United States was already larger than that of the other three largest countries: Britain, Germany, France, and even the sum of them, which made the status of the US dollar increasingly prominent.
During World War I, gold from European countries flowed into the United States to buy war materials. The Federal Reserve Bank of the United States used these gold as legal tender, which led to inflation. From 19 14 to 1920, the price level in the United States nearly doubled. Later, the Federal Reserve Bank of the United States decided to control inflation and tried to restore the price to its original level.
Then came the period of deflation, when the price level dropped from 200 to 1920 in one year, which was the biggest deflation in American history.
China Bank-China Bank Foreign Exchange Quotation