 Evidence of gunpowder's first use in China comes from the Tang dynasty (618–907).The earliest known recorded recipes for gunpowder were written by Zeng Gongliang, Ding Du and Yang Weide in the "Wujing Zongyao", a military manuscript compiled in 1044 during the Song Dynasty (960–1279).Its gunpowder formulas describe the use of incendiary bombs launched from catapults, thrown down from defensive walls, or lowered down the wall by use of iron chains operated by a swape lever.