Only If I Experience It First Can I Bring It to Reality

Bai Tu traveled through time, But this world is mediocre, lagging behind the original world in terms of technological civilization and entertainment games. I wanted to rely on my past life memories to enjoy life, but I couldn't do it. But one day, A key changed his life. ... From the cradle of early civilization to the stars... Bai Tu was stunned when he looked at the barbarian in front of him. ....... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.