What Happened to My Surname Xie?

Zhang Ming, a doctor of history, once traveled through time, he opened his eyes and was lying on a mass grave in Jiankang City. The stab wound on the chest has not yet healed, and the corpse collector's straw rope has been put around his neck. The only thing he could do was to pretend to use a dead man's surname - Xie. The Xie family in Chenjun County was from Gaomen, Jiangzuo. Being a descendant of a side branch has become his only talisman in this era of noble families. However, the death of the original owner was no accident: a fight between nobles on the banks of the Qinhuai River, and a blood-stained cloth strip with the word "Shen" dragged Zhang Ming into a fatal chess game that spanned the court and the rivers and lakes. In the eleventh year of Yongming's reign, the crown prince was newly mourned, Emperor Wu died, and the Northern Wei Dynasty moved its capital to the side. In these turbulent years, how can a son of the Xie family who pretends to be a surname survive to the end in the Jiankang City with a humble body and swords and swords?