Because after you become a soldier, you will enter a completely different environment from society, and there will be rules and regulations. Many young people in society will be uncomfortable after joining the army, and some will even be depressed. Some new barracks will run away, injure themselves or even commit suicide. Joining the army is not only a requirement for your physical fitness, but also a limit test for your psychological endurance. If you can't adapt to this collective environment as soon as possible, you are likely to enter a state of depression.
At this time, we need to have a good attitude to adapt to this pace of life. Of course, psychological tests are not that complicated. They are all simple questions, and they will be basically passed. Don't have any psychological burden.