I Came Back from a Million Years Ago

One day in 2222, a large spacecraft from the prehistoric civilization of the earth millions of years ago stayed in the sky above the earth! To fend off enemies from outer space! The owner of the spacecraft and human mentor Zhao Xiaofeng leads the heroes on earth to explore prehistoric civilization! The legendary gods such as the Witch Clan, Heaven, God, Satan, Allah, and Amon... Actually existed in the history of the earth! One after another powerful civilizations that have appeared on the earth have been annihilated by history! Humans have discovered the high-tech bases left behind by these prehistoric civilizations! The Earth Federation has been reorganized! The desperate fate of the earth finally has a turning point! Important note: This novel is hard science fiction and has no system! The setting is rigorous, the conception is ingenious, the author's character is guaranteed, and it is neither superficial nor supervising! This book is planned to be written in 5 parts, telling the stories of human exploration of the universe in different technological periods! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.