The Weapon Tycoon Who Traveled to Great Qin

Novel Summary
The uncle of a historical collector keeps an ancient secret. He has no heirs. He hopes that his nephew can inherit this ancient secret.
But the nephew has no interest. He is only interested in developing weapons. More new weapons. Earn more banknotes. This is his only pleasure.
However, in the process of passing on this ancient secret, an accident occurred. The nephew crossed.
Coming to the end of the Warring States Period.
Hey, if you come here, you will be safe. I am a weapon expert. Isn’t it easy to deal with cold weapons?
You have a cavalry, I have a machine gun, if you rush, I will mine mines, pull the barbed wire, you run, I’m an expert. There are tanks and armored vehicles on the ground and planes in the sky. Surrender.
What are you waiting for when mechanized weapons are used in ancient battlefields?
– Description from readMTL