The Qin Empire in Primitive Society

The protagonist accidentally travels to a small tribe in ancient North China because of saving someone. Use techniques such as making pottery and making nets to build houses to develop the tribe, improve your combat power by making bows and smelting copper and iron, and annex surrounding tribes to strengthen yourself. The protagonist knows that development is the last word, because the level of civilization varies under the same starry sky, just like Europe in later generations has strong ships and cannons, while the Indians in the Americas still have bows, arrows and spears. Under the law of the forest, if you don't eliminate others, you will be eliminated by others. In order to survive, the protagonist leads his tribe to fight against the sky, the earth, and people, and finally establishes the Qin Empire. Conquering the east and west, conquering the south and the north, finally established the territory of China.