Among China's four great inventions, gunpowder has the greatest influence on the history of human wars and killings. The invention of gunpowder and its application in the military field is the most important innovation in the history of war: before that, no matter how people tapped the shape and tactical potential of weapons, they did not jump out of the circle of cold weapons. When gunpowder is combined with manufacturing technology and appears in the form of guns, the war mode that has lasted for thousands of years since ancient times has been completely changed. The revolutionary influence brought by gunpowder continues to this day; Perhaps only the invention of nuclear weapons can be compared with gunpowder in the historical sense.