Chinese people discovered gunpowder in ancient times. Chinese people were discovering gunpowder during the Tang and Song dynasties. Chinese people had discovered gunpowder by the time of the Yuan dynasty. Chinese people have discovered gunpowder since ancient times.
Chinese people discovered gunpowder in ancient times.
Chinese people were discovering gunpowder during the Tang and Song dynasties.
Chinese people had discovered gunpowder by the time of the Yuan dynasty.
Chinese people have discovered gunpowder since ancient times.