Sima Guangchuan, who promulgated the policy of consolidating the rule, did not want to use it forever.

Many people think that Emperor Wendi of Sui Dynasty is the most relaxed of all the founding emperors. He was awarded the throne because he was the grandfather of the little emperor. In fact, this view is not to the point. Emperor Wendi of Sui just didn't go out in person, and the hardships of political struggle far exceeded the founding emperor of Han, Tang, Song and Ming Dynasties.

Emperor Wendi of the Sui Dynasty was originally a minister of the Western Wei and Northern Zhou Dynasties, and the highest power structure of the Western Wei and Northern Zhou Dynasties was the famous "Eight Pillars State", that is, Eight big noble held military and political power. These eight pillars have four Xianbei gate valves and four Han gate valves. Originally, the rulers of Xianbei unified the Northern Dynasties by force, but because there were few Xianbei people, it was difficult to rule the vast Central Plains, so they were forced to allow the Han people to organize armed assistance. Some Han Chinese forces took the opportunity to rise and formed the famous Guanlong Group, from which four Han Chinese in the Eight Pillars came. For various reasons, the influence of Guanlong Group soon surpassed that of Xianbei nobles, so the voice of pushing a Han Chinese to be an emperor became louder and louder.

Yang Zhong, the father of Emperor Wendi of Sui Dynasty, was a subordinate of Xianbei nobles and one of the eight masters. However, the Yang family also had some strength, married many nobles of Xianbei and Han dynasties, and became a very good coordinator and adhesive. Finally, Wendi's daughter became a queen, and he was his uncle's regent. Xian and Han nobles recognized his identity, and finally he became emperor.

It is supposed that Emperor Wendi of Sui Dynasty should represent the interests of Xianbei and Han nationality, but he has his own ideas.

The Sui Dynasty ended the long troubled times in the Northern and Southern Dynasties. People didn't want to go back to the aristocratic wars every day, and the common people suffered a lot. Deng Wendi herself didn't want the clan to be too strong to influence the rule. Therefore, he is determined to eradicate the imperial clan, which is the social root of the powerful minister. To do this, the first thing to do is to cut off the personnel rights of powerful officials and select new talents for their own use. Finally, Emperor Wendi of Sui decided to select talents through examinations.

In the third year, Emperor Wendi of Sui Dynasty issued a letter to recommend talents among the people, which was called "recommending people". He also emphasized that "Juren" comes from the people, regardless of family background, and the selection criteria are to have real talents and practical knowledge. According to the regulations, each state "pays tribute" to three people every year, and then takes the exam in Beijing and is hired as an official according to the results.

Later, Emperor Wendi of Sui Dynasty divided tribute into ten subjects, including filial piety, knowledge and other subjects to examine virtue, excellent academic sensitivity and other subjects to emphasize the administration of arts and sciences, and brawn and arrogance to select generals. Because the imperial examination system comes first, subjects like "muscle and pride" are not like formal national examinations in any case. After Yang Di succeeded to the throne, these examination systems were further standardized, and "tribute" and "selecting scholars by subjects" were collectively called "imperial examinations".

As soon as the imperial examination was opened, a large number of civilians continued to enter the ranks of officials, breaking the original pattern of officialdom. This is terrible for children who are crowded with others. The nobles are very aware of the dangers of the imperial examination system, and many people want to overthrow the dynasty as soon as possible while their strength is still there.

Due to the centrifugal force of the gate valve, shortly after the establishment of the Sui Dynasty, China fell into war again, and the gate valves of Xianbei and Han nationality were re-selected. Finally, another member of Guanlong Group, a descendant of Li Hu, one of the eight pillars, established the Tang Dynasty. However, due to the strong demands of ordinary people and many beneficiaries of the imperial examination, and the reluctance of Emperor Taizong.