Urban Carefree Immortal Emperor

5,000 years later, an immortal cultivator fighting for the fate of human beings. Unfortunately, he failed; and fortunately, he was reborn to be a human again, on the earth 5,000 years ago. With a second chance, he not only would embark on the road of saving all mankind, but also would retrieve his human nature on the new journey that would last for 5,000 years.