"What you see as your weakness is what kept me by your side in Yi City all those years." The kindness that was shown to him when no one else had ever bothered to waste their time in doing so for him. Xingchen was the only person who seemed to accept him...even if he didn't realize it was him at the time. That had been enough for him to change and to start to try and find ways to stay by Xingchen's side.