Traveling to the prehistoric world, the first step is to survive, and the second step is to have your own tribe. When other tribes eat raw meat and drink cold water, my tribe has learned to cook with pots and wear clothes to keep out the cold When other tribes rely on brute force to hunt and gather by luck, my tribe has learned to shoot the bow and shoot the net. When other tribes happily exchange seeds and farm tools from me, I have already started to domesticate Dinosaurs are used as animal power. When the people of other tribes stared blankly at the dinosaurs pulling carts for us, and the waterwheels with huge hammers forging iron at high speed, they couldn’t help but sigh that this is unscientific. But I want to tell them that this is science .