I remember that there is no diploma abroad, only a degree certificate. Adult education in the United States is mainly carried out in community colleges, and there are also various adult training courses in ordinary universities. For example, the so-called time spent by Peking University at Harvard. In fact, it's just a short-term training course that you can pay, and there is no formal degree certificate from Harvard. Foreign universities attach great importance to the degree awarded, because they recognize you as their student with the reputation of learning. You haven't finished full-time studies for several years, and you can't get a degree certificate at all. You can only go to a regular university, except for diploma workshops. But if you want to go back to China to find a job, you must do degree certification in the Ministry of Education. So if you want to take a shortcut, you should stay at home. It is much more chaotic than abroad, and it is easier to get a degree.