657 years ago today, September 14, 1368 (August 2, 1368, the Lunar Calendar), the Yuan Dynasty of China perished. On September 14, 1368, the Ming Dynasty army marched to Qishi Gate in the capital of the Yuan Dynasty and attacked the city. Emperor Yuan Shun panicked when he heard the news. He fled the palace with his concubines and traveled to Mobei. On this day, the Mongolian cavalry that used to sweep everything became a panicked bird. On this day, the once-prosperous Yuan Dynasty collapsed and reached the end of history. September 14, 1368 was historically the day of the demise of the Yuan Dynasty in China. On this day, Ming Dynasty general Xu Da led his army to capture Dadu, the capital of the Yuan Dynasty, which is today's Beijing City. On the eve of the Ming army entering the city, the last emperor of the Yuan Dynasty-the dissolute Emperor Yuan Shun took advantage of the night to escape the Urban area and rush to the Mongolian grassland. Although Emperor Yuan Shun continued to claim himself as emperor on the grassland, his regime was called the Northern Yuan Dynasty, but he had lost the ability to rule the world. Therefore, this day means the demise of the Yuan Dynasty, which has ruled China for more than 90 years. The Yuan Dynasty established its own capital in Dadu, which was the first time that Beijing became the capital of a national political power. The Yuan Dynasty's rule achieved the unification of China, but its brutal national oppression triggered a general uprising among people of all ethnic groups. Due to their arrogance and extravagance, the riders who used to bending bows and shooting large eagles in the past were so corrupt that they could not draw their bows or run horses after only one or two generations. However, the Mongolian aristocrats at that time who entered the Central Plains were unable to carry out timely military reforms. They still maintained the original tribal military system for their own ethnic groups. All young and strong men served as the army. Moreover, the military positions were hereditary, and their families followed the camp. After leaving the grassland grazing life, they were completely supported by the court. After entering the mainland, they made full use of their privileges and enjoyed them at will, and were intoxicated in wine and meat all day long. Since they were separated from the grasslands and did not have a grazing life, the officers and soldiers did not learn to ride and shoot, completely losing their past martial arts tradition. However, the Han and other ethnic groups recruited by the Mongolian and Yuan army always bore a grudge against the privileges of the Mongolian army. The soldiers fled seriously, and many troops only had vacant positions but no actual soldiers. It turned out that the very powerful military power of the Yuan Dynasty had reached a stage of decay in just a few decades. In 1351, an anti-Yuan uprising broke out nationwide. When the Mongolian army suppressed it, Lien Chan was defeated one after another. There have also been examples of more than 10,000 officers and soldiers being defeated by 36 insurgents, which reflects that the Mongolian and Yuan army, which used to be invincible in Europe and Asia, has been seriously corrupted and lost its combat effectiveness. Therefore, the Yuan government at that time had only appointed and bribed Han warlords as the main force in suppressing the peasant uprising. During the Anti-Yuan Uprising, Zhu Yuanzhang, who was born as a beggar and monk, rose in the south. He eliminated various warlords in the south and established the Ming Dynasty in 1368. Then, he carried out the Northern Expedition. The Ming army went smoothly after a large-scale Northern Expedition. Among them, Xu Da's troops moved forward from Dezhou by land and water, and first went to Tongzhou to defeat the Yuan Dynasty defenders. After Emperor Yuan Shun heard that Tongzhou had been lost, he panicked. He no longer had the prestige of his ancestors a hundred years ago and fled Dadu with his concubines from Jiande Gate, which is now north of Desheng Gate. On September 14, Xu Da led his army to occupy most of the land, which was basically peaceful. He sealed up the treasury. Later, in accordance with feudal superstitious concepts, in order to calm the royal spirit of the Yuan Dynasty, the Daming Palace of the Yuan Dynasty was demolished. However, most of the pattern of the Yuan Dynasty city was retained. After the Ming Dynasty recovered Dadu, it was changed to Peiping. Since the Northern Yuan regime still existed at that time, Zhu Yuanzhang, the founder of the Ming Dynasty, granted his fourth son Zhu Di the title of King Yan and stationed him in Peiping City. Strictly speaking, Zhu Di was born of Zhu Yuanzhang's Mongolian concubine. This person was ambitious. He was not satisfied with the title of King Yan. Later, he seized power from his nephew and later became the Chengzu of the Ming Dynasty with the year title Yongle. Finally, he moved the capital from Nanjing back to Peiping. As the capital was moved here, Peiping was renamed Beijing. After the Yuan Dynasty was occupied by the Ming Dynasty army, Dadu became Peiping, and later became Beijing. The history of China has since opened a new page.