At the end of the Sui Dynasty, many rebel armies raised their troops to rebel against the Sui Dynasty. Li Yuan, who stayed behind in Taiyuan, seized the opportunity to take advantage of the situation and raised troops. After several years of hard work, he established the Tang Dynasty. After unifying the world, the Xuanwumen Revolution occurred, Li Shimin ascended the throne, and the Tang Dynasty prospered through the rule of Zhenguan. During the Li Zhi period, the prosperous period first appeared, and the female emperor came to the throne and took the throne. In the prosperous age of Kaiyuan, Anshi experienced a sudden change. After that, the Tang Dynasty gradually went into decline, with feudal vassals and towns being separated, internal and external troubles. The Tang Dynasty slowly declined, party politics intensified, and the country declined. As the sun sets, the empire collapses.