C118 The Black Clothed Masked Men Can't be Seen

To Qin Feng, nitrate was more important than ice.

In the future, it could become Qin Feng's means to protect himself.

After all, nitrate, sulfur, and charcoal could be combined according to a certain proportion and become an era defining invention - gunpowder!

According to Qin Feng's understanding, in the current Great Zhou, gunpowder had yet to be invented. As long as he grasped gunpowder