For example, Yu Chunshun was lying naked in a tent, with his right hand raised and his left leg bent, as if he were walking. The sleeping bag and damp-proof mat were not opened, and there was a drawn Tibetan knife at the door of the tent.

In addition, after he set off that day, people caught up with him at 30 kilometers. At that time, he was in a good state and full of energy, but after breaking up, he only advanced less than 3 kilometers and died at noon the next day, while 1 1 and 12 had no wind during the day.

During the several kilometers he walked, there were four places where water and food were buried. First of all, he didn't move. Second, he only took a bottle of water. At the third point, he took two bottles of water. At the fourth point, he didn't move.

According to the specific types of problems, step disassembly/cause principle analysis/content expansion, etc.

The specific steps are as follows:/The main reasons for this situation are ...