Ancestors of the Changhe River

When others travel through time, they start with magical equipment, a shopping mall, and a portable space. When he opened his eyes, he became an ancient ape from 3.2 Million years ago. His brain was only one-third the size of modern humans. There were terrestrial cats squatting on the trees and hyenas surrounding them under the trees. He couldn't even speak a human word. There is a golden finger: living awake in the same body for thirty days will give you some evolution points; you can only exchange knowledge, not things; want to exchange fire? First, gather the conditions for making a fire yourself; if you change too much in one breath, your brain will shut down on the spot and you will die suddenly. He had no choice but to start from scratch with a group of hairy apes: two vines for hunting, a row of stones to repel the enemy, digging tubers to store food, division of labor, migration, building stone circles, teaching the first word, and fighting for the first cluster of fire. He died eleven times and was reborn eleven times. From a tree in the East African Rift Valley, he brought human civilization to cities and writing. Seven million years later, the child lying in front of the glass cabinet in the museum looking at the "Lucy" fossil will not know that the first fire of mankind was protected by a group of ancient apes with their lives.