After nearly a month's rest, Zhanggong is back to his old self. He asks the teacher how far his powers have grown in meditation. The teacher replies that he feels as if his current powers have hit a "bottleneck" . He tells the student that he has a question for him: how much water, air, and steam can a single bottle hold? The teacher answers that it depends on the size of the bottle. If the water becomes steam, then the bottle would still hold all the water and air in it. He says that this is the homework he's giving the student today. He'll try to apply this question to his magic studies. After the teacher leaves, the student wonders if he has the comprehension he had back in the day. He thinks that if he condenses his magic power, like water condenses into steam, he can gain more power. He wants to know why everyone is so far away from each other. He wonders why they don't all come closer together. When he goes to sleep, he feels that his space has been filled with light elements.