There is no such thing as continuous reading. People are originally separated, there is no limit, and they can watch whatever they want.
Undergraduate and junior college students can study together. After all, the course content and the examination time are staggered, as long as you have time and energy.
Sign up for the exam at will, there is no limit. Only when you get a certificate when you graduate, you need to show a lower-level academic certificate. That is, when receiving the self-taught undergraduate diploma, you must have a college diploma with the same academic qualifications recognized by the state (a few months of technical school junior college, a TV university junior college is also acceptable)