"You know how to make gunpowder?" Xu Qingan looked at Shen Wansan and asked with some surprise.

Gunpowder has never appeared in this world, this is a big killing weapon, and Xu Qingan does not plan to exchange gunpowder now.

Of course, there is a more important reason, that is, the exchange points of gunpowder are too high, and 80,000 points are required.

Xu Qing'an had also seen the four major inventions of China before, papermaking and printing were the most expensive, 100,000 points, and gunpowder

"The First Emperor of the Ages: Beginning with the Summoning of Wenchen and Military Generals" Chapter 110: The Way of Business! I am hitting it in my hand, please wait a moment,

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