 (Yule)" The English word "cash," meaning "tangible currency," is an older word from Middle French "caisse".In China, "cash" - not to be confused with the type of copper coin - refers to a unit used for centuries for copper coinage and banknote equivalents known as "wén" (文).Being the first country to implement paper based currency, in 1023 the 交子 paper money currency occur to adapt the economical climate change of globalization brought by fair trade via silk road, although metal coins were still in circulation.