There is no time limit for the self-study exam. You can apply for graduation as long as you pass all the exams, write a thesis and pass the defense.

There is no make-up exam for self-taught subjects; If you fail the self-taught exam, you can't make up the exam, and you can take it next time; The main influence of the failure of self-taught examination on candidates is to lengthen the graduation time of candidates. In addition, the results of self-taught single subjects are also valid, some provinces are valid for 8 years, and some provinces are valid for 6 years.