After the final exam, Ding chenjia tells his classmates not to be too stressed. In the future, more people will be destroyed and they will be replaced by people with defective genes. He tells them to go home with their report cards and show them to their parents. He assures them that he will not be "recycled" and that he is an "ordinary human" as long as he takes the last position in the test. His father praises him for his hard work and praises him again for his first place in the provincial joint entrance exam. His mother asks him why he wants to wait for his classmate, and he tells her that there are "genetically modified humans" everywhere. She tells him that she heard that the little girl was a defective product and that she was not allowed to remain on the "Genetically Modified Human List" because she worked so hard to get the last place on the exam. The boss thought that it was "amazing" and agreed to observe the girl for a while. This time, however, the girl is stupid and gives in to the boss's orders to take the last seat in the exam, which is the same as the last time she took the exam six months ago. Her expression is so blank that she can't even remember the name of her destroyed classmate. The narrator tells the story of how the average person erases the memory of a classmate, but the person with bad genes cannot. He says that the only thing that can be done is to destroy the person.