Introduction to the primitive society period at the dawn of civilization: The world is dark and yellow, where do I come from? Standing on the wilderness covered with traces of birds and animals, laying stones to make utensils, delivering firewood, humans and apes saying goodbye, and the bloodline has gone through many changes. The morning light awakened by the bone flute bathes the original farm beside the river. They grind stones and paint pottery, fish, hunt, farm and spin, live in caves in the wild, and build cities and establish states. Attack the soil, attack the soil, civilization is created by everyone.