I'm Playing with Technology in the Demon World

Tu Lei took the technological system and traveled to a world where demons were rampant and humans were weak. In this era when all races are still in tribes, see how the protagonist uses technology to shine. Rifles, machine guns, artillery, war fortresses, aerial gunships, electromagnetic guns, robots, Transformers, mushroom bombs, accelerated particle cannons, Unit 1, Star Destroyers, artificial humans, two-way foils, water droplets, all kinds of powerful weapons are displayed in this world, oppressing the nerves of all races and killing countless strong men of all races. (This book is semi-invincible.)