Wu Zetian is the second daughter of Wu Shihuo, the founder of the Tang Dynasty. Her mother is Yang (born in the royal family of Sui Dynasty, and her father is her younger brother, King Guan De of Sui Dynasty). Her ancestral home is in Wenshui County (now Beixu Village, Wenshui County, Shanxi Province). In the seventh year of Wude (624), he was born in Chang 'an (now Xi, Shaanxi) and was born in Lizhou (now Guangyuan, Sichuan).