1. The Battle of Ming and Yuan Dynasties is one of the most important historical events in the Ming Dynasty. It was a strategic decisive battle between the Ming and Yuan armies in the vast areas of Central Plains and Northwest China from October of the 27th year of Yuan Dynasty (1367) to December of the 2nd year of Ming Hongwu (1369). 1July 368, Xu Dahui met. In August, the Northern Expeditionary Army invaded Dadu, ending the rule of the Yuan Dynasty in the whole country. This year, Zhu Yuanzhang established the Ming Dynasty and changed the Yuan Dynasty to Hongwu, which was the official debut of the Ming Dynasty history for Ming Taizu. After that, Zhu Yuanzhang spent nearly 20 years destroying other peasant armies, defeating the remnants of the Yuan Dynasty (Northern Yuan Dynasty), completing the reunification of China and ending the vigorous peasant uprising at the end of the Yuan Dynasty.

2. The four major cases in the early Ming Dynasty are one of the most famous historical events in the Ming Dynasty, which refers to the four famous events or massacres planned by Zhu Yuanzhang, the founding emperor of the Ming Dynasty, in order to eliminate people he thought were a threat to his court, rectify official administration and punish corruption. After Zhu Yuanzhang pacified the world, he sealed the hero and had doubts about the hero. He took this opportunity to promote the Hu case and the Aquamarine case, clean up the powerful and illegal meritorious deeds, abolish the Chinese book province and no longer set up a prime minister. The total number of cases involved reached more than 30 thousand, and then Zhu Yuanzhang used the arrogance of General Aquamarine to punish more than 15 thousand people. In addition, the air seal case and the Guo Huan case are collectively called the four major cases in the early Ming Dynasty. Zhu Yuanzhang strengthened the imperial power through a series of means, such as cracking down on heroes, setting up a royal guard and strengthening spy surveillance.