Among the prime ministers of the Yuan Dynasty, Bo Yan's power is rare. He rejected the Mongolian kings, hated the Han people and threatened to kill Zhang, Wang, Liu, Li and Zhao. He also ordered the abolition of the imperial examination, prohibiting Han Chinese and southerners from learning Mongolian and symbols.
1340 (six years later) in February, Bo Yan's nephew escaped the support of the beneficiary clan and went hunting in Bo Yan, where he was demoted. Hui Zong came to power. The following year, the Yuan Dynasty changed to the right, announced "Geng Hua", resumed the imperial examination, banned horses, reduced the amount of salt, and revised the three histories of Liao, Jin and Song. Once, politics was relatively stable. When Tuotuo became the right prime minister of Zhongshu for the second time, the national treasury was empty and famine was frequent. In order to save the crisis, he revised the banknote law and saved the river disaster, but these failed to fully alleviate the intensified social contradictions. The extreme sharpening of class contradictions and ethnic contradictions at the end of Yuan Dynasty finally led to the peasant uprising at the end of Yuan Dynasty. The uprising was large in scale and lasted for a long time. The peasant uprising army with the Red Scarf Army as the main force dealt a heavy blow to the rule of the Yuan Dynasty in the whole country, and finally overthrew the Yuan Dynasty in 1368 (the 28th year of Zheng Zheng). In fact, it drove the Mongols out of the Great Wall.