Princess Zhongtian once lived in a house, which refers to the imperial daughter and ancestral daughter of Zhao and Song Dynasties. Zhongtian is often used as a synonym for Zhao and Song Dynasties. History of Song Dynasty Volume 65: Tianshui, the surname of the country, Wang Ye. The surname Zhao in the world comes from Tianshui. Tianshui has Tianshui Hall, where Zhao worships his ancestors. The ruler of the Song Dynasty was surnamed Zhao. Therefore, the nomads from the south committed a crime and took away the emperor Qin Hui. Song Huizong was named King of Tianshui County and Song Qinzong was named Duke of Tianshui County. One government, the whole government department. Princess, princess, the title of imperial daughter, imperial daughter and eldest daughter in ancient times, referred to as Lord for short, and the male title corresponding to princess is king.