Da Qin: I Traveled to the Warring States Period and Became a Weapons Tycoon

The uncle of a history collector keeps an ancient secret. He has no heirs and hopes that his nephew can inherit this ancient secret. But the nephew showed no interest. He is only interested in developing weapons. More new weapons. Earn more money. This is his only pleasure. However, in the process of passing on this ancient secret, an accident occurred. My nephew traveled through time. It came to the end of the Warring States Period. Hey, let's take care of it as it comes. I'm a weapons expert. Isn't it easy to deal with cold weapons? You have cavalry, I have machine guns. If you charge, I will lay mines and pull barbed wire. If you run, I am an expert. There are tanks and armored vehicles on the ground, and planes in the sky. Surrender. Mechanized weapons were used on ancient battlefields. What are you waiting for?