During the Three Kingdoms period, Diaochan, a songstress of Minister Situ Wang Yun of Emperor Xian of Han, was worshiping the moon in the back garden when a gentle breeze suddenly blew and a floating cloud covered the bright moon. At this moment, Wang Yun happened to see it. In order to show off how beautiful his daughter is, Wang Yun told everyone that my daughter is so beautiful that the moon can't compete with her and quickly hides behind the clouds. Therefore, Diaochan was called "Biyue".