Adult education belongs to adult education series. Including: adult colleges (full-time), TV universities, high school self-study, correspondence, night universities and so on. It has the difference between junior college and undergraduate course. Graduation certificate belongs to adult education series. Some are issued by schools, and some are issued by education administrative departments. Although the country recognizes academic qualifications, it is still not so recognized in society and is not as valuable as ordinary colleges and universities. But it is still useful in practice, such as promotion of professional titles.