Talk:Wei Boyang

when was gunpowder invented again?
According to this article, this guy documented the composition of gunpowder in 142 AD...about 8 centuries before gunpowder was first invented in China? — Preceding unsigned comment added by 82.123.162.92 (talk) 22:25, 29 May 2012 (UTC) Bad things theres alot of bad things and then there is mamadoo