After the primary school is promoted to the first grade of junior high school, the school must first verify your household registration book to see if it belongs to the local enrollment scope. If not, it will not be accepted. Children should move in one year in advance when they register for junior high school. Some schools where students live with their parents also require that "the two certificates must be in the local area for one year". For example, in Beijing, Shanghai and other places, some famous schools have limited the transfer time of students enrolled in "nearby enrollment" because of the surplus of students. These factors prevent children from attending their favorite key schools.