Gunpowder.
Gun powder
The Chinese invented it for fireworks and to use in war. The Europeans made weapons to use it.
They used gunpowder for fireworks and weapons.
I'm pretty sure the Chinese used them as rockets
1. Fireworks. The Chinese first used gunpowder for use in firecrackers and fireworks. the military applications came later.2. Weapons. The Chinese used gunpowder as warheads in crude rockets and as the propellant in primitive guns and cannons.
The Chinese used gunpowder as early as 800-1000 AD, for fireworks and later for weapons. It was not in widespread use in Europe until around the 1300s.
Paper and gunpowder were invented by China. The Chinese used gunpowder primarily for fireworks celebrations. Paper was utilized for writing. European found gunpowder useful for weapons. Canons and hand guns used it for war and warfare became even more deadly.
Gunpowder was first invented in China no later than about A.D. 850. For hundreds of years, it was used mainly to create fireworks. The Chinese did not use gunpowder as a weapon of war; it was the Europeans who first adapted explosives for use in weapons. By the fourteenth century, Europeans were widely using the explosive as a military device to project stones, spearlike projectiles, and metal balls from cannons and guns.
It was either the Chinese or Japanese a few hundred years BC. They made the first fireworks to use as weapons.
This would be the Chinese hand cannons that they developed during the late middle ages for fireworks purposes later changed to weapons of war.
Chinese were isolated for a long time while, British invented many weapons which let Great Britain defeat China in the Opium War.
Black Powder.