Sun Simiao, a famous doctor and alchemist in the early Tang Dynasty, wrote in the Single Crystal Sulfur Law that sulfur and saltpeter should be ground into powder and put into a silver jar or a sand jar. Dig a hole, put a pot in the hole, level the hole and fill it all around. Light three honey locust seeds that have not been eaten by insects one by one, then put them into a pot and set off fireworks with sulfur and saltpeter. When the smoke can't catch fire, stir-fry the charcoal until one-third of the charcoal is extinguished, then anneal it, wait until the mixture cools before taking it, and then subdue the fire.
Gunpowder can't solve the problem of immortality, and it is easy to catch fire. Alchemists are not interested in this. The formula of gunpowder was transferred from an alchemist to a strategist and became one of the gunpowder in four great inventions of ancient china.
The initial use of gunpowder was not in the military, but in the acrobatic performances of various military circuses and puppet shows-fireworks acrobatics in medicine dolls in the Song Dynasty. In Song Dynasty, acrobatic programs such as Bao Gong, Hard Ghost and Mime all used new gunpowder products such as "Blasting Array" and "Spitting Fire" to create a mysterious atmosphere. At the same time, Song people also performed magic tricks with gunpowder, such as spraying fireworks and clouds to avoid people and change things, so as to achieve the effect of illusion and confusion.
Militarily, it is mainly used as the propellant of bullets and shells, the propellant of rockets and missiles and the energy source of other driving devices, which is an important part of ammunition. Outstanding achievements in the history of human civilization. Because of its lethality and shocking power, gunpowder is one of the important inventions of human civilization, which has brought the functions of relieving armistice and security defense to mankind.
References:
Baidu encyclopedia-gunpowder