Pei Xiu
Pei Xiu was Pei Su's second of three known sons, and all three (Pei Xiu, his older brother Pei Chou (), and his younger brother Pei Qiu () eventually passed the imperial examinations in the "Jinshi" class. It was said that in youth, Pei Xiu was stern and righteous in his behavior. He and his brothers resided at his father's vacation home in Jiyuan, and Pei Xiu, in particular, rarely ventured outside it, studying the Confucian classics in the day and studying poetry in the evening. On one occasion, when someone gave the brothers a gift of venison, Pei Chou and Pei Qiu accepted the gift and summoned Pei Xiu to eat as well. Pei Xiu responded, "We are but poor students, and we do not even usually have enough for vegetarian meals. If we eat meat today and get used to it, how can we continue it in the future? I will not change my diet."