In colleges and universities, there are also opportunities to upgrade to undergraduate courses. You can directly take the college entrance examination, which is only for college students. As long as you work hard, you can also take part in the self-study exam in your spare time, and get the college diploma and undergraduate diploma together when you graduate.
How to repeat after dropping out of junior college
In the first case, it doesn't matter if you take the exam yourself. Find a class teacher and you can continue your studies. If you pass all the exams you should pass, you can get a diploma.
In the second case, if you are in junior college, after dropping out of school, the class teacher did not delete your student status, but went through the formalities of suspension for you, then you can continue your study and get the diploma later than your classmates.