Feb. 2 years, 496 (Rat flood the temple), Northern Wei changed Tuoba surname Yuanshi.

Northern Wei Emperor Xiaowen the Tuoba macro order to accelerate the Northern Wei regime feudal, the implementation of the reform. February 2, 496 years flood the temple two decades (Shen Tai Wo) Emperor Xiaowen life the Xianbei aristocracy switch to Han Chinese surnames. He said: Wei ancestors out of the Yellow Emperor, the earth king. Husband on the color yellow, of all things yuan, so the change of surname yuan.