A parallel world similar to the Song and Ming Dynasties on earth is called "Dayan Dynasty". At the end of the dynasty, the emperor was fatuous and the government was corrupt. The vassal kings in various places were ready to take action. The northern nomadic "Golden Wolf Tribe" frequently went south to plunder. The world was in chaos and the people were in dire straits. Military technology remains at the peak of cold weapons, and the only firearms are crudely made firecrackers.
