Mainly because the gold content is different. One is to take the adult college entrance examination, and the ordinary undergraduate course is to take the national unified college entrance examination. If you are looking for a job, good institutions require full-time undergraduate courses, and it makes no difference to take the civil service exam. You can sign up for the exam. And what is written on the diploma is different, such as a university, a college of continuing education of a university. The employer knows at a glance that if you show your ability after being hired, you can bring benefits to the company, so even a prestigious school is useless.