Yongle in Shi Sheng.

According to "Sixteen Records of Ming History and Geography", "This plan was sealed in the early Ming Dynasty, starting from Korea in the east, Tibet in the west, Annan in the south, Dabai in the north, 11,750 miles from east to west, and 10,940 miles from north to south."

The territory of the Ming dynasty includes the mainland 18 provinces today. In the early years, it reached the Sea of Japan, the Sea of Okhotsk and Wudi River Basin in Northeast China, and later changed to Liaohe River Basin. Arrived in the Gobi desert in the north in the early years, and later changed to the Great Wall today; Northwest to Hami, Xinjiang, and later changed to Jiayuguan; It has also set up detention centers in Manchuria, Dongjiang and Tibet. During the reign of Cheng Zu in Ming Dynasty, he even conquered and ruled Annan (now northern Vietnam) for a short time. During the Yongle period, the land area of the Ming Dynasty reached about100000 square kilometers. After the 15 in Saibei area 1930, due to the cold weather and poor farming, the border guards were transferred by the prince during the Jingnan campaign. Therefore, the border moved slightly southward during this period. During the Yongle reign of the Ming emperor, the Ming army made many northern expeditions, and the border situation once changed. However, after the mid-Ming Dynasty, with the re-emergence of Mongolia, the border moved south again. The Great Wall (then known as the side wall, see "Ming Great Wall") was built to defend Mongolia. Nine major towns (Liaodong, Jizhou, Fu Xuan, Datong, Yansui, Ningxia, Gansu, Taiyuan and Guyuan) were set up along the Great Wall to strengthen the defense. The Great Wall also became the northern part of the middle and late Ming Dynasty, and it was also the dividing line between agricultural areas and nomadic areas. In the seventh year of Yongle in the Ming Dynasty in Northeast China (1409), Nur Padawan was established in Northeast China, under which more than 130 health centers were administered. Xuande was abandoned in the 9th year of Ming Dynasty (1434), which lasted for 25 years. However, the original health center and Liaodong headquarters still exist to rule the local area. During the orthodox period of Ming Yingzong, Nuzhen, the Tatar of Wuliangha and Jianzhou, moved south and invaded the capital of Liaodong. After the 1930s in Northwest China 15, Turpan in Northwest China and Mongolia in Qinghai became increasingly powerful. In the fourth year of Yongle (1406), the Ming army attacked Annan in the southwest, and the southern line reached the area of Rinan County. The following year, Annan's Political Department was established, with 15 prefectures, 36 states and more than 200 counties. Later, due to the fierce resistance of the local people, the Ming court gave up in the second year of Xuande (1427), and Annan restored the Li Dynasty.