In 1449, the Ming Dynasty ushered in the largest Waterloo in history. In 1368, the Ming Dynasty was established. After five emperors worked hard, the Ming Dynasty ushered in its heyday period. However, Yingzong came to the throne, and the eunuch Wang Zhen accompanied Yingzong from an ignorant boy to a weak crown. Therefore, Yingzong trusted Wang Zhen very much, which caused Wang Zhen to control the government, eradicate dissidents and frame Zhongliang, making the Ming Dynasty weak and precarious. During Yingzong's reign, the Mongolian Oirats invaded the border in an emergency. The eunuch Wang Zhen urged Yingzong Yujia to go on the expedition. On the way, Yingzong was weak and was defeated by Oirats under Wang Zhen's management, so that Yingzong was taken as a prisoner to threaten Daming. Empress Dowager Sun decreed to exonerate Yu Qian from the death penalty, and was ordered to make Zhu Qiyu emperor in the midst of danger. The emperor and his ministers worked together to defeat Oirat and welcome Yingzong back. The battle for the throne between Yingzong and Zhu Qiyu gradually unfolded
Yingzong abdicated to Zhu Qiyu, and with Zhu Qiyu's support, Yu Qian was ready to carry out reforms, but because he touched the rights and interests of nobles, Yu Qian repeatedly Frustrated. Yingzong did not give up the throne, and colluded with Shi Heng to seize the throne. The civil and military forces of the Manchu Dynasty, led by Yu Qian, were dissatisfied with Yingzong's actions and were massacred.