Zhao Kuangyin, the founding emperor of the Song Dynasty, was a fully armed general at that time. He became the founding emperor through the Chen Qiao incident, and then relieved the general of the military power through the "relieving the military power with a glass of wine" incident, and took it for himself.

Because the founder became emperor in this way, he was extremely taboo about the situation that the generals were fully armed and tried his best to prevent things from happening.

However, in order to maintain the rule, we have to arrange generals to lead troops, and we have to restrain military generals. Therefore, during the Song Dynasty, generals were frequently mobilized to prevent them from cultivating their own forces and completely controlling the army.

In the constant deployment of troops, generals are constantly changing frequently, which leads to unfamiliarity between generals and soldiers, which seriously affects the combat effectiveness of the troops, but on the other hand, it also consolidates its rule.

The situation of "soldiers don't know soldiers, soldiers don't know generals" in the Song Dynasty was purely caused by the rulers' fear of leading generals.