After Time Travel, I Dominate the World with Hard-Core Weapons

The protagonist Leng Chen was a weapons developer in his previous life and was proficient in ordnance. Accidentally traveled to the cold weapon era. As soon as I crossed over, I used homemade guns and cannons to kill the bandit group with zero casualties. Since then, he has relied on his superb military technology to become the king of arms, and embarked on the road to develop military industry, build a hot-armed army, and unify the world for hegemony. With the power of one person, he set off an industrial revolution in another world. He built firearms, cannons, tanks, airplanes, aircraft carriers, and spaceships. He killed bandits, destroyed rebels, defeated princes, traveled across the ocean, and conquered all countries along the way, and unified the world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.