This paper expounds the characteristics of the permanent vehicle travel permit distinguished from ordinary vehicles by the signs in the wall. Outside the wall is a sign called a "child's card", which indicates that vehicles with this card can park in the school district, but not enter the school district. The article mentions that parking permits inside the fence are green and outside the fence are blue. All kinds of documents need to be updated on time. The article concludes by calling on parents to understand and cooperate with school regulations in order to provide a safe environment for their children.