Correspondence is a learning form of adult higher education. Other learning forms of adult higher education include amateur learning (evening university) and full-time learning (full-time). Correspondence is also a teaching method. It belongs to a learning level of higher education, mainly according to the teaching plans of various majors, sending teachers to various correspondence stations to organize face-to-face lectures and examinations during winter and summer vacations or national legal holidays.

Passed the national adult college entrance examination and was admitted to colleges and universities, and issued admission notices. Belonging to the national education series, the state recognizes academic qualifications, participates in the national unified adult college entrance examination and enrollment examination, and all provinces and regions organize enrollment in a unified manner.