At the beginning of the Zhou Dynasty, Zhou Wuwang made the second son of Gu Gong, the king of Zhou Dynasty, the son of Yu Zhong (now north of Pinglu County, Shaanxi Province). During the Spring and Autumn Period, there was a descendant named Xi in Yuzhong. Because he lives in baili township, he is also called bailixi. He is a doctor in Yuzhou. In 655 BC, the State of Yu was destroyed by the State of Jin, and both Priscilla and Yu Jun became prisoners and slaves of the State of Jin. At this moment, Qin Mugong proposed to Jin Xiangong, and Jin Xiangong married his daughter to him. At the same time, he sent Prissy to Qin as one of his servants. Prissy didn't want to be a slave, but she ran away halfway, but was quickly caught by the Chu people and became a slave of the State of Chu. Qin Mugong is an ambitious monarch, and he has been recruiting talents. After hearing that Priscilla was a talented person, he was determined to get him back. He was afraid that a large sum of money would attract the attention of Chu, so he redeemed him as a fugitive slave with five sheepskins according to the value of slaves at that time. After talking with him in Qin Mugong, he praised him and named him a doctor. The descendants of Priscilla took his name as their surname and called it Baili.

Ancestor of surname: Priscilla. The surname of Baili originated from the surname of Ji, and the ancestral name was Shi. The second son named Zhou Weiyu (now Pinglu County). During the Spring and Autumn Period, a man named Xi appeared among his descendants. My family is poor and I have been to various countries. Once in Qi, it was abandoned, and then in Zhou, it was still useless. After returning to Yu, the official went to the doctor and assisted the monarch. When destroyed by gold, they became slaves. Because he proposed to Kim, he was also sent to Qin as a wedding gift. Xi couldn't stand his humiliation, so he fled to Chu. After being enslaved by Chu, Qin Mugong got it. At that time, he was recruiting talents and accepting benefits, so he redeemed Xi with five sheepskins (later called Dr. Xi Wu Yuan). After discussing with him, Qin Mugong found that he was a scholar and was appointed as a doctor. Grateful to know what he met and help Qin, making Qin one of the most important tyrants. Later generations respected his virtue and took Guo Yu Li Bai, his birthplace, as his surname. "A Brief Introduction to Tongzhi Imperial Clans" said, "After Dr. Qin Bailixi, he worried about others first, and his home was in Baili, because of his home." Therefore, the descendants of Priscilla regarded him as the ancestor of Priscilla.