Nice to meet a friend who likes Song Dynasty. In fact, my view of the Song Dynasty is that the Song Dynasty was the most open and economically developed dynasty in China, and the economic development brought up a large number of businessmen. As we all know, businessmen are profit-seeking, so this idea of businessmen without national and ethnic concepts led to low morale and low combat effectiveness of the army at the end of the Song Dynasty. At the same time, the concept of good people not being soldiers was widespread in the Song Dynasty. In the Song Dynasty, some people were forced to participate, and their enthusiasm can be imagined. Finally, the Song Dynasty was a transitional period of capitalism, from cold weapons to hot weapons. Therefore, as long as the Song Dynasty persists, it will certainly become the most powerful country, because we all know that new things are weak at the beginning, but how can it be invincible in the face of Mongolia with strong cold weapons?

As for other corruption, I personally think it is superficial.