Renminbi with a Roman number for the crown, folk collectively known as the Roman number, for example, III X X This is a three-digit Roman number, known as the three crowns, VIII IV is the two Roman known as the two crowns. There are two kinds of running number colors, red is called red Luo (red crown), VIII IV I is three Roman called red three Roman. The blue color is called Blue Roma (Blue Crown) IX II This is a two-letter Roman number. Blue two Roman.