Reserve currency economy, the German Deutsche Mark gained the status of the second most important reserve currency after the US dollar. When the euro was introduced on 1 January 1999, replacing the Mark, French franc and ten other European currencies, it inherited the status of a major reserve currency from the Mark. Since then, its contribution to official reserves has risen continually as banks seek to diversify their reserves, and trade in the eurozone continues to expand. Former U.S. Federal Reserve Chairman Alan Greenspan said in September 2007 that the euro could replace the U.S. dollar as the world's primary reserve currency.
Chinese cash (currency unit) "wén" and written with the same character. In 1695, the Shogunate placed the character "gen" () on the obverse of copper coins. Vietnam gained independence from China in 938 and merely carried on the tradition of using cash. The first Vietnamese cash was issued in 968. Chinese cash (currency unit) The cash () was a currency denomination used in China in imperial times. It was the chief denomination until the introduction of the yuan in the late 19th century. The English term "cash" was first used on coins issued in Kwangtung (Guangdong) Province in 1900. It did not appear on