Tuesday.

This morning, self-study was Yan Weimin's class, the head teacher of the class. As soon as the bell rang, Song Yan consciously took the textbook and went to the corridor.

Yan Weimin, who came to the classroom, looked at him lightly and ignored him no longer.

Just as he approached the platform, Yan Weimin smelled a foul odor. He looked around and saw nothing. Suddenly, he found that the four students sitting near the desk all intentionally or unintentionally covered their noses. Obviously, they also smelled the foul odor.

After Yan Weimin entered the classroom, Zhang Natural and three other boys were looking at him quietly and found Yan...