They needed to have an evening class during the military training, but they could sit or rest their arms on the class desk in the classroom to relax themselves. Unfortunately, the instructors told them to come to the playground, which would make it impossible for them to have a rest.
No one was willing to do that, but nobody dared to resist.
In the evening, they didn't need to wear a military uniform, and they could put on casual clothes, so they went to do laundry in their dorm rooms after having dinner.
After a long day, their clothing was quite stinky, it was intolerable.
Because it was hot, the clothing would be completely dry after being hung up for a night.
The instructors were going to teach them songs about the military, which had been popular for a long time, so most people were familiar with them or even able to sing them. Accordingly, the students soon learned them.
