Traveling Between Two Realms, I Became the Ancestor of Gaowu!

[Travel between two worlds] [Appear as a saint in front of others] [The boss behind the scenes] [It's so cool to upgrade without a heroine] [It's so cool without any brains] Lu Yuanzhou once traveled through the world of Gaowu and brought with him a small black door in the sea of consciousness. Eighteen years later, the black door was fully charged, transporting him directly from the world of Gaowu three hundred years after the disaster to the first year of the disaster. Lu Yuanzhou traveled to the darkest era three hundred years before the disaster, when ferocious beasts were raging and human civilization was on the verge of collapse. Three hundred years ago, Jiangnan City was still struggling to survive in the ruins, and human martial arts had just sprouted. Three hundred years later, all the people practiced martial arts, the genetic lock was broken, and martial arts flourished. Lu Yuanzhou discovered that he could travel freely between the two worlds. In the world three hundred years later, he is a loser who has failed to pass the martial arts college entrance examination. But three hundred years ago, every set of basic body-building techniques in Lu Yuanzhou's mind were peerless techniques that were enough to establish a sect. In this life, it is up to me, Emperor Lu Tian, ​​to suppress all disasters in the world!