I Make Weapons in Another World

Chu Tianshu, a genius in science and engineering, traveled through the world of cultivation, but found that he was just a member of the bottom class of society with the least talent. In order to protect his important people and home, he started a scientific and technological cultivation mode. You have great talent, I can make guns. You have a high level and I have an AK. You are the proud son of heaven, I have Gatling with blue fire. When the big boss appears, the color of the world will change. Don't be afraid. I will rub a nuclear bomb with my hand to blow up the big boss. I will be invincible under the immortals.