2. The summer in the original book corresponds to the Western Wei Dynasty, and Yan Xun and Yu are all aristocratic children of this country. Yan Xun's family is the king of different surnames in this country and has the right to return the land and defend a frontier. Later, Yan Xun's family was destroyed by the emperor, and Yu was an aristocrat in the Western Wei Dynasty and the fourth young master of Yu's family. Xiao Ce, male No.3, Prince Nanliang, corresponds to the side hall in the book. The play belongs to the Southern Dynasties and the Western Wei Dynasty belongs to the Northern Dynasties. At that time, the North and the South confronted each other, and the overall strength of the North was stronger than that of the South.