They are said to be sworn brothers, no matter what they do, they always do it together. They skip class together, fight together, eat together, play games together, and share a dormitory room. They share everything, except perhaps a girlfriend.,"Okay, we're all from the same district, and we're just heading back anyway. Let's go together!",Watching Zhang Yi just walk away like that, Guan Hao wanted to chase after him, but he was pulled back by Liu Xing: "Forget it, Haozi. Maybe after three years, people and things change. He might not even consider us old friends anymore."。