In this chapter, we are introduced to a new character named Yuxiyu, who has just returned from her first day of school. She is very excited to be back at school and is eager to get back to her studies. She tells us that she is going to stay for a while and then she will ask her father to take her to the library and the monitor to do homework. Yuyu tells her that her father is busy doing homework and that she should ask him to help her with the homework. She says that she likes math very much and that it is very easy to learn. She compares the previous chapter to a 21st century version of the game Rata 21, which is very difficult to learn because it is not based on real-world problems. She also says that the previous question was very scary, but now that she has learned how to do math, she is not afraid of math at all. She explains that if she wants to get 105 out of the exam, she should be able to draw conclusions from one case for all the cases in the exam. She will answer all of the questions on the exam page.