Xíng Yóng, appellation Zǐáng, was a Héjiān Mò man. He was nominated as Filial and Incorrupt and recruited by the Excellency of the Masses, but in both he did not accept. He changed his surname and style and moved to Yòuběipíng, and followed Tián Chóu’s travels. After five years, Tàizǔ settled Jìzhōu. Yóng said to Chóu: “The Yellow Scarves rose over twenty years ago, the land within the seas is boiling in confusion, and the common people wander homeless. Now I have heard that Lord Cáo use strict laws and commands. The people loath disorder. The disorder will soon be pacified. I ask to go in advance.” Therefore he packed and returned to his hometown.
Tián Chóu said: “Xíng Yóng is a man with foresight.” Therefore he went to see Tàizǔ, and asked to serve as his local guide in overcoming Liǔchéng.
Tàizǔ recruited Yóng as Jìzhōu advisor. The people of the time praised him: “In morality and conduct the most esteemed is Xíng Zǐáng.” He was appointed Chief of Guǎngzōng, but then due to mourning for a former commander designed his post. There were those who reported this. Tàizǔ said: “Yóng is loyal to his old master and has true moral integrity,” and did not make inquiries. He was again recruited to the staff of the Excellency of Works, then appointed Magistrate of Xíngtáng, encouraged the people in mulberry farming and greatly improved public morality. He entered Court as Gate Commander to the Chancellor, was transferred to Zuǒféngyì, fell ill, and resigned his post.
At the time Tàizǔ was selecting good officials to the followings of his sons. The order read: “The noble household clerks should be well learned in law as the sort of Xíng Yóng.” Therefore he was appointed as Household Deputy to the Marquis of Píngyuán [Cáo] Zhí. Yóng firmly held to ceremony and was never flexible, and because of this they did not get along. Companion Liú Zhēn wrote a letter of admonishment to Zhí: “Your Household Deputy Xíng Yóng is an accomplished man of the northern lands. From youth he maintained high moral integrity, is calm and profound, speaks little and reasons much, and is truly an elegant scholar. I honestly cannot compare with this man or stand side by side with him. Yet I receive special favor and courtesy [from you], while Yóng instead is neglected. I fear those who see this will say that you sir was not educated properly and have insufficient courtesy to worthy men, favoring your Companion as a spring flower, and forgetting your Household Deputy as an autumn fruit. So I send up this warning, that your offense is not small, and you must correct this.”
Later he became Military Advisor to the Chancellor, and was transferred to East Department Official. Previously, the Heir-Apparent had not been chosen, and the Marquis of Línzī [Cáo] Zhí was highly favored, and Dīng Yí and others all heavily praised his greatness. Tàizǔ asked Yóng, and Yóng answered: “Using a lesser son as a successor was something previous generations all warned against. I hope that Your Highness Descending the Palace will consider this very seriously!” Tàizǔ noted his warning. Later he was appointed as Junior Tutor to the Heir-Apparent, then promoted to Grand Tutor.
When Wén-dì ascended , he became Palace Attendant and Secretariat Archer, was titled Marquis within the Passes, sent out as Colonel-Director of Retainers, and returned as Minister of Ceremonies. Huángchū fourth year  he died. His son Yǒu succeeded. (1)
- Jìnzhūgōngzàn states: Yóng’s great-grandson Qiáo was styled Zēngbó. He had capable and tolerant and had good reputation in his time. He held pure office. During Yuánkāng [291-299] he and Liú Huàn both were appointed Secretariat Appointment Officials, and eventually reached Colonel-Director of Retainers.