In a small town in southern China, there is a school that is quite young. The school is called Zhuangyuan School. Although the school has gone through many vicissitudes of life, it is still as strong and upright as ever. It seems that even a major earthquake cannot shake it. There are four tall buildings standing in the school, one of which is the school's office building, and the other three are teaching buildings: one is for primary school students, one is for junior high school students, and the third is for high school students. The only flaw of this school is that there is no teaching building for college students, people often joke about it. There are many kinds of plants planted in the school, including green old trees, gorgeous flowers, and green grass. Therefore, the school often has butterflies, bees, birds and other creatures as guests. Birds often chirp gracefully in the sky above the school and in the trees, which adds a bright color to the monotonous classes at school. The school's gate faces south. The principal said that facing this direction will have good feng shui and talents will emerge in an endless stream. Maybe the principal is right. Many students from the school are admitted to prestigious universities every year in the college entrance examination. Therefore, many students outside the town are eyeing this school, but the principal has a closed-door mentality: only locals from the town will be admitted, and the rest will be rejected. Therefore, students outside the town can only stay away.