The Delimiter of Immortals and Demons

A young man strays into the fairyland, redeems himself through various adventures, and finds the meaning of life amidst various disasters! The parallel world is in full swing, and the path of human youth's cultivation mission travels in reverse through the past, present, and future of the human world, experiencing feudal farming, the steel world, nuclear crisis, alien invasion, cloning disaster, and artificial intelligence crisis. This is a complex and three-dimensional world!