After the birth of the new imperial city, how to keep the foundation alive became a question that Zhu Di had been thinking about. "The emperor guards the national gate." In order to repel the invaders on the northern border, Zhu Di, known as the "emperor on horseback," decided to personally lead the expedition to lay a solid foundation for peace for his grand cause. Civil and military achievements are the governing dreams of every emperor, and Zhu Di is no exception. At the beginning of his accession to the throne, he named the reign Yongle, which was to seek peace and happiness forever. The Ming Dynasty experienced the diligent governance of the Yongle Dynasty and the "recuperation" of the Hongxi and Xuande Dynasties, achieving progress and prosperity in the economy, culture, and art. With a solid foundation and social stability, the Ming Dynasty entered its heyday. Confucianism pursues meritorious service, morality, and words. Zhu Di understood that in order to become a wise monarch, he not only had to enrich the country and strengthen the army, expand the territory, but also leave a cultural treasure to history. Under Zhu Di's order, a great masterpiece came out, and this historical masterpiece, the Yongle Encyclopedia, which is a culmination of Chinese culture, has become a symbol of Chinese culture today.