Absenteeism is a common occurrence in colleges and universities, and it is generally not recorded.

First of all, the scores of all courses in the university are calculated according to 20%+ 80% of the usual exams (probably this distribution method). If you leave early and miss class, it will only affect your usual grades. If the teacher is good, he will generally not care about giving you the same score at ordinary times. Strict teachers will give you less, but you just don't study hard and don't do well in exams.

However, you can't often be arrested for truancy, because the general academic affairs office stipulates that if you are arrested for a course more than a few times, you will be directly exempted from the exam. That would be a great loss.