As the saying goes, one sulfur, two nitrates, three charcoal, add a little sugar Big Ivan!

Li Congyan also knew these "secrets", but when he really developed gunpowder, it was not so simple to say.

In the R&D Department of the Ministry of Military Affairs, Li Congyan, Li Wei, Guo Gan, and several backbone workers of the R&D Department sat around, and everyone had a copy of the materials for the manufacture of gunpowder, which Li Congyan sorted out.

"Lord, this is ......, gunpowder? But what is the cure? ”

Li Wei asked, but then denied his guess and said, "That's not right! Charcoal, sulfur, saltpeter, these are all things that cause fire, and they are combined......

"New Tang Dynasty" Chapter 143 Primordial Gunpowder is being hit by hand, please wait a moment,

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