Crown is the most precious of the ancient ceremonial crowns in China, in which 12 multicolored silk ropes are used, and each crown runs through 12 multicolored jade, which is arranged in the order of Zhu, Bai, Cang, Huang and Xuan, and the distance between each jade is 65438. However, the pendant of ancient coronation clothes was not limited to five colors. According to the records of the later Han Dynasty, these twelve pendants are white jade beads. The son of heaven is twelve, and the princes of Zhou Dynasty are divided into nine, seven and five. However, it was gradually limited to emperors, so "crown" became synonymous with emperors.