Surviving in Ancient Times, I Became a Recorder

Ye Xuan traveled to a parallel world of ancient times of one hundred thousand years, and was told by the system that this timeline was broken. He was required to lead the ancient people to survive extreme weather and develop tribes. Ye Xuan accepted the task of the system. Can he successfully lead the ancient tribe through extreme weather and development, and return to the original world? Please read the text. Note: No heroine This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.