Gunpowder is always used in killing weapons, and its main ingredients are 75% potassium nitrate, 15% sulfur, and 10% charcoal. It is well known that gunpowder was invented by the Chinese, yet to the world's surprise, the Chinese people did not even need it in the war. The Chinese just like to be very happy to hear others from all over the world say "Did You know that Gunpowder was invented by the Chinese? "