Generally, it takes at least 2.5 years from admission to graduation in online education colleges, 2.5 years in adult education colleges or undergraduate courses, and 2.5-5 years in study years.

Network education is a kind of adult education. At present, there are four kinds of adult education: online education, open education, self-study examination and adult correspondence (adult college entrance examination), all of which are adult education diplomas recognized by the Ministry of Education.