The moment the laboratory exploded, Lin Feng thought he was dead. When he opened his eyes again, he saw towering ancient trees and the fangs of a saber-toothed tiger. With his knowledge of science and engineering, he drilled wood to make fire and refined bronze, and was regarded as a god by primitive tribes. Until he discovered that the tribal warriors had the Chi You totem tattooed on their foreheads, and that the leader surnamed Ji on the other side of the Yellow River had united with the tribe surnamed Jiang - he was shocked to realize that he had become the military leader Chi You in Chinese mythology!
Not bad, give me five stars to encourage you.