Dai Yuan was chivalrous and uninhibited when he was young, and once robbed business travelers on the Yangtze River. Lu Ji returned to Luoyang after his vacation and brought a lot of luggage. Dai Yuan ordered some teenagers to rob him. On the shore, sitting on Hu's bed and directing his actions, including all aspects. Dai Yuan's face is proud and upright. Even if he does such a sneaky thing, he seems to be very free and easy. Lu Ji said to him from a distance in the cabin, "How can a man like you be a robber?" Dai Yuan shouted, threw away his sword and joined Luji. Dai Yuan's words are unusual, and Lu Ji pays more and more attention to him. They became friends and Lu Ji wrote him a letter of recommendation. After crossing the river, Dai Yuan became a general in the west.