Returning from the Star Sea: I Change the Myth for the Human Race

In 2149, the earth was dying, and Zhang Xiaotian was one of the billions of poor people abandoned. Twenty years of hard work were spent in exchange for an interstellar immigration ticket, but he fell into a mythical world while traveling through the Nine Stars. This time, he wants to go against the flow of time and return to the place where the story began, rewriting the outcome of the entire civilization for his abandoned home planet and compatriots.