This book takes two little boys, Ru Ziniu and An Feichi, who are opposed to each other, as the protagonists, and describes all kinds of interesting things that happened in the class where these two little boys were in school from the perspective of children, thus sketching out the group image of the whole class. In this book, you will see what tricks Teacher Wangwang has come up with to "deal with" the students who give him a headache, what great inventions the students of Class (2) have created in order not to cheat, and the wonderful performances of the Three Musketeers who make you want to applaud. Of course, it also contains the "love-hate relationship" as always between Ru Ziniu and An Feichi.