Zhao Kuangyin's contribution, the first is to solve the drawbacks of military commanders' interference in politics for thousands of years. The separatist regime of this buffer region was an important reason for the demise of the Tang Dynasty. After Zhao Kuangyin took office, he directly took the method of relieving the military power by drinking a glass of wine, so that all his military commanders could go back to their hometown and enjoy their old age. Put your general power in your hand, it will be safer. At the same time, the chief judge is set up to supervise the local time and report immediately if there is any trouble, which puts an end to the military commanders' desire to be independent.
The second is to open a new era, that is, the literati group. In the past, eunuchs and consorts were autocratic. They either used the monarch or were used by the monarch. However, since the Song Dynasty, the influence of consorts has been weakened, but civil service groups have been formed. In addition, Zhao Kuangyin said that they can't kill literati, because they have amulets, so they dare to talk big. However, the monarch is helpless.
Of course, when you say that Zhao Kuangyin has unified the whole country, it is a formal unification, because sixteen states have not been returned yet! This place is a headache for successive monarchs in the Northern Song Dynasty. Tong Guan bought it after seeing it. Of course, these places were not all returned, and the real solution was in the Ming Dynasty. If you were Zhao Kuangyin, how would you take back these places?