2. It depends on which unit you went to, usually 2-3 years.
3. If you are a college student who is going to be a soldier, you have two ways: 1, go to the army, and be admitted to the military school the next year, and then you will be a military school student and bid farewell to your present school. You went to the army and didn't get into the military school. After two years, you will go back to your old school to continue your studies. You were retained as a student in the army, so you can still come back to study when you join the army. However, this school is still your original school. If you have won second-class merit or third-class merit in the army, the school can directly promote you to a junior college or redistribute your major.
4. Yes.
5, generally will not go. College students are bustling places when they join the army.