You are Wei Ying who died a few years ago. Mo Xuanba he sacrificed his whole body to summon you because he wants revenge help him in return you will have this body When you were on your way to the manor,you saw disciples from Gusu Lan there.During the exorcism, they had difficulty, so they call Lan Zhan. You were afraid of being discovered, so you ran away, Jiang Cheng beat you thinking you were Wei Ying ,Lan Wangji came Jiang Cheng: "Follow me back" Lan Wangji: "he will stay in Gusu Lan"