Shellfish was the earliest currency in China, and it was used in Shang Dynasty. In China's Chinese characters, all the words related to value are mostly related to "Bei". With the development of commodity exchange, the demand for money is increasing, and shells can no longer meet people's needs. Shang people began to imitate seashells with copper. The appearance of copper coins is a major evolution from natural currency to artificial currency in the ancient currency history of China. With the extensive use of artificial coins, seashells, a natural currency, gradually withdrew from the currency stage in China.

1, USD (abbreviation: USD; "O 42 17 Currency code: USD; ; Symbol: USD) is the legal tender of the United States of America. At present, the US dollar banknotes in circulation are all the banknotes issued since 1929. The issuer of dollars is Congress. After World War II, it finally became an international currency.

The pound is mainly issued by the Bank of England, but there are also other issuers. The most commonly used symbol of pound is; The currency code of ISO 42 17 adopted by the International Organization for Standardization is GBP (British pound). In addition to Britain, the currencies of British overseas territories are also denominated in British pounds, and the exchange rate with British pounds is fixed at 1: 1.

3. RMB (abbreviation: RMB; Currency code: code; Currency symbol: ￥ is the legal tender of People's Republic of China (PRC). This coin was issued by the People's Bank of China, 1948 12 1 for the first time, and a new version was released at19991,forming a variety of banknotes, coins, plastic banknotes, ordinary commemorative coins and precious metal commemorative coins.

4. Euro is the currency of EU 19 countries. The 19 members of the euro are Germany, France, Italy, Netherlands, Belgium, Luxembourg, Ireland, Spain, Portugal, Austria, Finland, Lithuania, Latvia, Estonia, Slovakia, Slovenia, Greece, Malta and Cyprus. _ Euro symbol.

5. The Japanese yen (_), also known as Japanese yen, is the official currency of Japan, and its paper money is called Japanese bank note, which is made in 187 1. The yen is also often used as a reserve currency after the dollar and the euro. The currency symbol is "RMB", and its standard code is defined as Japanese yen by ISO 42 17. Japanese Roman Japanese yen. The Japanese word "_" is the abbreviation of "circle" (simplified Chinese characters), which is pronounced as "ぇん" (en) and formulated as1_ = 1000 yuan =1000 Li. The British name is "Japanese yen"; The symbol of Japanese yen is similar to that of RMB. International Organization for Standardization В17defines its standard code as JPY. The Japanese yen is expressed by ￥, and the Japanese yen is expressed by a number followed by an e, for example ￥ 1400E.