The Process of Civilization Starting from Ancient Times

Sima Nai is an expert. He can do time travel even when he is studying questions and sleeping in the middle of the night. What kind of trouble is this? Not to mention traveling through time, this is a bit of a bad luck, and you can go directly to the original world. You don't have anything to ask for. You are really starting from scratch. Did you see it? Subdue saber-toothed tigers with your bare hands, punch Nanshan barbarians, kick North Sea sharks, and knock down all those who are backward. This era is the era of Sima. Sima teaches you step by step how to develop rapidly from ancient times. Those who are backward are destined to be beaten. You are so powerful, does your mother know? The barbarians next door were so scared that they peed!