Because the Ming Dynasty was the last dynasty ruled by the Han nationality, if the Ming Dynasty didn't perish, there would be no prosperity of Kanggan and China wouldn't be perished by foreigners. But if the Ming Dynasty was in its heyday, let alone the Manchu Dynasty, it might not be like the Qing Dynasty when Eight-Nation Alliance came. In short, the Ming dynasty was not as blind and arrogant as the Qing dynasty. Why? Due to frequent contacts with foreigners in the Ming Dynasty, muskets and guns of the three camps in the Ming Dynasty were all obtained from foreigners, and some of them were made by China people themselves. Zheng He made friends with foreign countries when he went to the West. Did the Qing Dynasty have too much contact with foreigners? As much as the Ming Dynasty? At most, some foreign businessmen.