These courses will first announce the courses and time, and then let students choose courses online at a specific time period.
It is said that it is an elective course, but some courses are very popular because of various reasons such as content, easy passage and non-attendance. Some courses are notorious pits, and I don't want to take them because of their names. In addition, the number of places in each course is limited (after all, the classroom is so big). In the case of insufficient manpower, everyone wants to choose the most popular courses, and what the school says about choosing courses becomes a class grab.
Generally, there are no places for popular classes in a few minutes.
I haven't been able to grab classes for several years, so it's sad to think about it.