576 years ago today, on August 31, 1449 (August 14, 1449 lunar calendar), the Ming Dynasty "Civil Engineering Change". In the 14th year of the orthodox (1449), Zhu Qizhen of the Ming Yingzong personally fought against the Wala army and was captured. It took place in Tumubu (now southeast of Huailai, Hebei Province), hence the name. Zhu Qizhen of the Ming Yingzong was only 9 years old when he ascended the throne. The eunuch Wang Zhentang was in charge of the ceremonial warden and controlled the government. At that time, the Mongolian Wa Thorn tribe in the north was becoming increasingly powerful and posed a threat to the Central Plains. Wang Zhen was not prepared for the northern frontier defense. In July 1449 (the 14th year of the orthodox), the leader of the Wa Thorn also led his army to attack the Ming Dynasty southward, and the main force was approaching Datong Ming Yingzong was bewitched and held hostage by Wang Zhen, regardless of the dissuasion of his ministers, and decided to take the army personally. Because Wang Zhen missed the military plane, the Ming army was surrounded by the Wa Thorn army in Tumu Fort (now Huailaidong, Hebei Province). On August 31, 1449 (August 14, the 14th year of the orthodox order), the Wa Thorn army launched an attack, and the Ming army collapsed across the board. During the melee, Wang Zhen was killed by Ming General Fan Zhong, Yingzong was captured by the Wa Thorn army, and more than half of the Ming army was killed or injured. This battle is known as the "Civil Engineering Change" in history. The "Civil Engineering Change" seriously weakened the national power of the Ming Dynasty. The civil engineering change shocked the world, not only did Ming Yingzong become a prisoner of the Wa Thar army, but the entire capital was also in jeopardy. In the face of danger, Yu Qian, who was in charge of the Ministry of War, stepped forward. He supported Zhu Qiyu as emperor with civil and military officials, foreign and foreign ministers, and re-established the political core of the Ming Dynasty. He led all parties to defend the capital with the same hatred. With the support of the residents of the capital, he repelled the invading Wala Army. He also tried to use Yingzong as a hostage to blackmail and force surrender, but failed. He also first released Yingzong in the first year of Jingtai (1450) when the blackmail failed, the invasion was resisted, and Yingzong was released. This is the only emperor in history who was captured and returned safely. After being released, Yingzong calmly served as the supreme emperor in the Nangong for 6 years, and finally re-sat on the throne of the emperor in the change of 1457.