History has laws to follow, which shows the law of things' development. Chaos and unification will not last long, and sudden dispersion will meet with acute gathering, and the big yin will be against the big yang, and the urgent yin will be against the urgent yang, and the urgency will be delayed and delayed for a long time. If you divide it for a long time, you will divide it for a long time. History is like waves in water. There are more ups and downs, and fewer small ups and downs. History has the overall force of convention and needs to be continued before and after. Qin wants the image of Han Dynasty, Sui wants the image of Tang Dynasty, and Republic wants the image of Republic of China. I don't know much about Han Dynasty. There are some similarities between the Sui Dynasty ErLuan and the Tang Dynasty ErLuan. Qin Ershi and Li Shimin both killed their brothers, and Wu Zetian changed greatly according to its rhythm.