First, the ethnic policy of the Song Dynasty was oriented by literati.
The rulers of the Song Dynasty learned from the lessons of past dynasties and found that it was often military commanders (including Zhao Kuangyin) who rebelled, so they advocated ruling the world with literati, improving the status of literati and belittling the status of soldiers. In this case, a large number of famous literati emerged in the Song Dynasty, such as Fan Zhongyan, Su San and Ouyang Xiu. Of course, it's not just that. In order to make people read, the rulers of Song Dynasty increased the number of imperial examinations.
Although there are many such literati, they have more opportunities to become famous. More people won the bid, and the rulers of the Song Dynasty gave the literati the green light and directly set up some new official positions to prevent the successful bidder from having no official positions. Moreover, most emperors in the Song Dynasty liked to write their own articles and poems. The most famous is Song Huizong, and Song Huizong is undoubtedly a famous writer and painter in the Song Dynasty. His literary achievements are no less than those of literary celebrities. Officials like to engage in culture, and people will certainly follow suit.
Second, the literati group has become a political intermediate force.
Another reason for the enduring culture of the Song Dynasty is that the literati group gradually became the political intermediate force in the Song Dynasty. The rulers of Song Dynasty improved the status of literati, but they did not guard against literati. Scholars gradually mastered the affairs of state. After the literati group came to power, it naturally encouraged the growth of literati. I hope that the culture of the Song Dynasty will continue to prosper, and the literati will always be the masters of the world. In fact, many emperors in the Song Dynasty wanted to change this situation.
Song Renzong and Song Shenzong, for example, all want to lower the status of literati, but once the interests of literati groups are touched, those literati dignitaries will huddle together and even the emperor can't help them. Although the culture of the Song Dynasty lasted for a long time for these reasons, it also completely corroded the Song Dynasty. The corruption of civil servants in Song Dynasty was very serious. These officials often misappropriate the relief funds allocated by the imperial court to the people, and even let them eat empty salaries.