Correspondence education is a kind of distance education activity by means of communication. Students are mainly taught by correspondence, supplemented by face-to-face instruction. Teaching links include self-taught textbooks, face-to-face tutoring, exchange of questions and answers, and concentrated experiments.

Internship, commenting assignments, stage tests, final exams or exams, graduation design or writing papers, etc. The organizers are correspondence schools, full-time schools or approved institutions, organizations and other institutions.

This form of study is suitable for office workers and candidates with less free time. The school distributes learning materials by mail, usually studies at home, gives lectures several times before the end of the semester, and then unifies the examination. Besides correspondence, there are amateurs.

Correspondence education has always been recognized by the state, and many civil servants have also obtained correspondence courses first. Correspondence graduates enjoy the same treatment as general education graduates in national examinations such as cadre employment, professional title evaluation, salary and treatment, and civil service examination.

The learning form is flexible, which not only adapts to the study of employees in many mobile departments such as railways, highways, geology and water conservancy, but also adapts to the study of employees with special working conditions and housework; The specialty setting is highly targeted and practical, and students do not study full-time and get quick results; Spend less money, do not need to build new school buildings, and make full use of existing teachers and various teaching facilities.