Yu Shenghui traveled to outer space by accident and was judged to be mentally retarded. His only means of earning a living was of course collecting garbage. He accidentally discovered that he could travel back to the earth. Therefore, he had two identities. There are migrant workers who collect waste products, the founders who guide the life of aliens, and on the earth, there are rich men who specialize in selling magical technologies, and tycoons who are surrounded by beautiful women and presidents. They use the civilization of the earth to deal with aliens, and then use alien The civilization of the stars is against the earthlings, the backward over the advanced, the barbaric over the civilized, and the low-level over the high-level