After Zhu Yuanzhang established Daming, he promulgated a series of policies with the political goal of "preventing summer". In the Northern Song Dynasty, most people in the northern region were taken by Hu Hua in the Jin Dynasty, and in the Yuan Dynasty, they experienced the second Hu Hua. The southern region was relatively untouched, and Zhu Yuanzhang ordered the custom of banishing the conference semifinals. At the beginning of the uprising, Zhu Yuanzhang took the slogan of expelling Land Rover, restoring China, establishing the framework of the past and helping the people. In order to maintain his rule, Zhu Yuanzhang wanted to change the customs of the country and restore the country centered on the Han nationality.

During the Five Dynasties and Ten Kingdoms period, the northern region was occupied by foreigners. Locals are also forced to change their customs. In the Northern Song Dynasty, the rise of the Jin Dynasty once again made the northern region fall, and the rulers of the Jin Dynasty forced Baixin to learn the culture of the Jin Dynasty, so the people were Hu Hua. The strength of the Mongols led to the occupation of the northern region. The people were also influenced by the Mongols, and the local people were deceived. After Zhu Yuanzhang's reunification, northerners' consciousness of "preventing summer outside" was weak, and Zhu Yuanzhang increased his control over his thought of going north.

For the south, the people in the south were not killed by Hu Hua. Under the rule of the Southern Song Dynasty, it was not breached by the Jin Dynasty, but still retained the culture of the Han people. After the demise of the Southern Song Dynasty, the leaders of the Yuan Dynasty formulated a policy of rule by custom, and the people in the south were once again protected from the rule of Hu Hua. So compared with southerners, they respect the culture of the Han nationality more.

In order to consolidate his rule and respect the Han people, Zhu Yuanzhang established a dynasty centered on the Han people. And formulated many policies to protect the Han system in order to curb the northern Hu people. Through a series of reforms, the national atmosphere has gradually restored its former glory, and Daming's national strength is booming.