"Bai Gui" is Zhang's real name, which was later renamed by Li Shi 'ao, the magistrate of Jingzhou. 1525, Zhang was born in a scholar's family in jiangling county, Jingzhou prefecture. His great-grandfather had a dream: the moon fell into the water tank, and then a white turtle surfaced, so his great-grandfather casually named him "Bai Gui", hoping that he would honor his ancestors in the future. 1536, Gui, who was only 12 years old, took part in the imperial examination, and his agility won the love of Jingzhou Zhifu 'ao. Shi Leo told Bai Gui Jr. that he should aim high when he was young, and be loyal to his country when he grew up, and renamed him Juzheng.