Euro is the currency of EU 19 countries. The 19 members of the euro are Ireland, Austria, Belgium, Germany, France, Finland, the Netherlands, Luxembourg, Portugal, Spain, Greece, Italy, Slovenia, Cyprus, Malta, Slovakia, Estonia, Lithuania and Latvia. In June 1 999+1October1,the EU countries implementing the euro implemented the single currency bill. In July 2002, the euro became the only legal tender in the euro zone. The euro is managed by the European Central Bank (ECB) and the european system of central banks (ESCB), which is composed of the central banks of the euro zone countries. In addition, the euro is the currency of six non-EU countries: Monaco, San Marino, Vatican, Montenegro, Kosovo and Andorra.

There are 7 kinds of euro grass samples released by the European Monetary Bureau, with face values of 5 euros (gray), 10 euros (red), 20 euros (blue), 50 euros (orange), 100 euros (green), 200 euros (yellow) and 500 euros (purple) respectively. The ticket face consists of three basic architectural elements: window, gate and bridge, which respectively represent the spirit of openness, cooperation and exchange in the European Union.