Outdoor survival training, they were given a day's food, but they had to stay on a designated island for three days.
During these three days, they needed to find the indicated locations on the island's map and record the signs hidden at these sites. There would also be hidden ambushes in the middle; if they were 'killed', the outdoor survival training would immediately fail, which, of course, meant that their results would not be good.
The grouping for the survival training was announced on the second day. Five classes went to one island, led by their class leader, who supervised for cheating and administered first aid in emergencies.
However, the class leader for the second row, third class, who had left before the survival training started, was unable to find a temporary leader due to staffing issues, so they dumped them on the class leader of the neighboring class.