Niu Qianbei Shen is a senior military attache, whose appearance time should be earlier than the early years of Xuan Wudi in the Northern Wei Dynasty, which is related to the military habits of Xianbei people in the Northern Wei Dynasty. From Dao to Shou Shen, then to Wei, the name of Niu Qianshou Shen gradually evolved. "Zhuangzi Health Master" said: (My Lord) has solved a thousand cows, but the blade is new. Therefore, there is a kind of self-defense imperial knife that the emperor carries with him, which is called "Thousand Bullies Knife". Its name is Zhuangzi, which means "Sharp can kill a thousand cows". Later, during the Northern Dynasties and the Northern Wei Dynasty, a high-ranking praetorian guard appeared. They are not only responsible for the safety of the emperor, but also hold the imperial knife. This kind of guard is "a thousand cows for health".