Let's start with Li Shimin: No matter in TV series, historical novels or even official history, it is written that his father played a great role in Taiyuan's fight against Sui Dynasty. This role is like that Li Yuan would attack Sui, otherwise he would not take part in the war. Thus, Li Shimin made a lot of contributions in the process of establishing the later Tang Dynasty. After the Xuanwu Gate incident, Li Shimin killed his brother and forced his father to abdicate. He worked hard when he became emperor. The rule of Zhenguan, the style of writing in the Tang Dynasty was open, and the mind was open. The name of the emperor could be said casually, which was not found in other dynasties. People in the Tang Dynasty were confident, but all this was a good start for Li Shimin. A book "Zhenguan dignitaries" can be said to be the criterion of later emperors.
Besides, after the death of Emperor Taizong, Wu Zetian gradually gained the imperial power with her own political mind, and became the oldest emperor in the history of China at the age of 6 1 year. Wu Zetian ascended the throne and destroyed a large number of Li's royal family, but it was from this that she laid the foundation for the prosperity of Kaiyuan. In the later period of Emperor Taizong, there were many aristocratic children in the DPRK. The ministers at that time, such as Feng Dejian, Du Ruhui, Fang and Cen Wenben, were all born in a scholar-bureaucrat family, so it was difficult for ordinary children to enter the DPRK, not to mention those born in poverty, because they didn't have any teachers to serve them and didn't know the ministers of the dynasty. Many people write the calligraphy used in the exam to courtiers, so that they are mistaken for courtiers' students and enter high school. Wu Zetian acceded to the throne because many children from poor families had the opportunity to turn over, and because only children from poor families hated Li Tang's relatives and consorts the most. However, due to the need to use these poor children to help them get promoted, Wu Zetian also appointed many cruel officials, such as Zhou Xing and Lai Junchen. But Wu Zetian made the dreams of many poor children come true, benefiting ordinary families. When she died, Wu Zetian knew how to be a good person and laid a talent foundation for the development after the Tang Dynasty.
Finally, Li Longji, Li Longji and Emperor Xuanzong of the Tang Dynasty became emperors with the unremitting efforts and help of many loyal ministers of the Tang Dynasty. With the continuous accumulation of the Tang Dynasty and the Wu Dynasty, the Tang Dynasty at this time can be said to be rich and prosperous, and Xuanzong was a great monarch. Therefore, under his rule, the Tang Dynasty was not only peaceful in the world, but also known as the most glorious era in the history of China. Kaiyuan Shi Sheng was his greatest contribution, but later he fell in love with Yang Yuhuan. It leads to the tragedy that people who love beauty don't love mountains and rivers. It can be said that the rise and fall of the Tang Dynasty were all caused by him. It is indispensable for the development of the Tang Dynasty to turn decay into magic and vice versa.