Self-taught graduation certificate is different from online education of adult college entrance examination. Not only is there no restriction on student status and years, but there is also a big seal and a different steel seal. There are examiner colleges and self-taught classes, which consist of two chapters. Because the scores of single subjects and each exam are the responsibility of the study room, everyone is responsible for self-study, and the examiner is responsible for the practice class and papers, so two different departments are responsible, so two big seals are needed.