The narrator introduces us to the wealthy Xu family, who occupy a large estate in the city. They also have a private airport, which they call the "Xu family" . The narrator tells us that the family has a very extravagant lifestyle, and that everyone in the family suffers from airsickness. He tells the narrator to get ready to return home with his father first. He also tells him to take his medicine and use the air in the estate to nurse his body. He says that if the air continues to get worse, he will not be able to return to the estate. He warns the narrator not to worry about his sister, because she is his "precious sister," and he doesn't want her to harm him. He adds that he can't stay in the same sick state as his brother, because his sister likes boys who have "a sense of justice." The narrator says that the Xu family will be holding a banquet for him and his family now that he's back, so he needs to get used to the idea of being a part of the family.