Look at the ideas that other Dahe operas extol and the characters they describe. The so-called "fine traditions" are not developed overnight. There is nothing else in the world but the king's land. The side of the couch allows others to sleep soundly. The changes in the map represent thoughts, collisions and games. In a simple word, it can either advance the world, or break up and confront it, and settle down in a corner. Doomed to extinction like five generations. Why did the Song Dynasty start a rare war to destroy the country? Because history is not a simple repetition. How sad is a country without reflection.