The way to fill in and enroll volunteers in public junior high schools is that every primary school graduate must fill in a volunteer and go to one or several secondary schools corresponding to his primary school for further study. If the number of volunteers reported by a primary school in a middle school is less than or equal to the enrollment index of the primary school, he will be automatically admitted to the middle school; If the number of volunteers in a middle school is greater than the index number of the middle school in the primary school, microcomputer allocation will be adopted for admission. After volunteering, no one can change.