Currency relative values of the different currencies. Currencies in this sense are defined by governments, and each type has limited boundaries of acceptance. Other definitions of the term "currency" are discussed in their respective synonymous articles banknote, coin, and money. The latter definition, pertaining to the currency systems of nations, is the topic of this article. Currencies can be classified into two monetary systems: fiat money and commodity money, depending on what guarantees the value (the economy at large vs. the government's physical metal reserves). Some currencies are legal tender in certain political jurisdictions. Others are simply traded for their economic
Chao (currency) Chao (currency) The chao () was the official banknote of the Yuan dynasty in China. Unlike the earlier paper money such as jiaozi, it was the first paper currency to be used as the predominant circulating medium in the history of China. The primary press was the Imperial Mint established in 1260, probably in Yanjing. It was certainly located in Khanbaliq after that city was established the same decade. Regional capitals were sometimes authorized to print money as well. The money of the various eras of the Yuan were also separately known, as the Zhongtong notes and Zhiyuan notes of