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!",And Zhang Yi went straight to the blacksmith's shop and found NPC Er, who was still forging equipment late at night, and gave him a level 1 energy crystal.。