The selection of class cadres is not very good. In less than two months after the selection of class cadres, some students in their posts did not strictly perform their duties, which was also reflected by the assistant of the class teacher. Although the class assistant talked to them, they didn't do well as required, and then the class assistant never took care of it again. It was not until the second year of high school that they decided to re-select class cadres. I think this is because the class assistant didn't do well enough.