C715 kinship sign

Long Tianyu was secretly happy, if he could produce a large amount of gunpowder, it would be able to be used as an explosive and a detonator. At that time, when he fought the Huns, he could at least kill a lot of enemy soldiers, and even if he could not use the cannons on a large scale, it would be ineffective.

"The Huns and the Pandas are invading the Western Regions, I, the burly man