Assuming you mean the weapons usedin ancient China, they were mostly hand weapons such as swords, pole arms, daggers and spears. Distance weapons included bows and arrows and crossbows. Later weapons included cannon and rockets using black powder.
The Chinese invented it for fireworks and to use in war. The Europeans made weapons to use it.
gunpowder
For decades the Chinese Army used weapons which have been copied from Soviet weapons, but they were even cheaper versions with less performance, although they are very rugged and reliable under wartime conditions. In recent years there are indications that China is placing more emphasis on quality instead of quantity.
Chinese were isolated for a long time while, British invented many weapons which let Great Britain defeat China in the Opium War.
They used gunpowder for fireworks and weapons.
No nuclear weapons were used in the Korean War.....
Gun powder
Gunpowder.
Bows and spears
I'm pretty sure the Chinese used them as rockets
Yes, it is possible for military forces to use captured enemy weapons in war, but there are rules and regulations that govern their use.
Nuclear weapons is a rare sight, and used to protect soldiers in war.