Compulsory education contact letter is a letter sent by the school to students or parents, which is used to confirm students' willingness to enter school and related information, and to provide school contact information and admission process. It is mainly to establish contact with students or parents to ensure that students can enter school smoothly. Admission notice is a document issued by the school to students or parents, which is used to inform students that they have been admitted and to determine the specific admission time, place and requirements. It is the official confirmation of the admission result by the school and has legal effect. Usually, the admission notice will include the specific requirements, admission procedures and relevant regulations of the school.