Thank You for the Invitation. I Was Fooled as Soon as I Wore It.

Others start with golden fingers and become emperors at the end. Why did Li Rui travel through time? Not only did he land as a prisoner, he was about to be trapped and killed, and the others were either mechanical or chemical experts. The problem was that I was a coder, and I had already given back the things I learned to the teacher. What is the formula for gunpowder? What is the ratio of sulfur to charcoal? Apart from total combat and horseback slashing, I have no military foundation at all. Dad Ma, please take me back quickly. I can still fight, I can still enjoy blessings, and I can still move. Let's see how the protagonist counterattacks the natives.