A Weapons Expert Who Traveled Through the Tang Dynasty

Came to Datang 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 and I have rifles. 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! What was it like using mechanized weapons on ancient battlefields? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.