If you say that continuing education colleges are also self-taught, it is the same, but the learning methods of continuing education colleges and social training institutions may be different. Continuing education colleges generally have more full-time study, and social training institutions generally have amateur classes. For example, doctoral education is a weekend class system, and amateur classes are more suitable for office workers, and of course students are also suitable, because office workers and students use weekends to recharge. Improving yourself is a very good way to use your time. Off-the-job study is suitable for people who are very, very eager to get a certificate and can temporarily devote themselves to study and exams.