Science fiction doomsday immigrants

In the future 2 159, there will be two kinds of human beings in the world: one is the rich, who live in the pollution-free man-made space station paradise, and the other is the poor, who carry piles of waste and overpopulation to linger on the earth. There are channels of communication between the two worlds. However, Jodie Foster's "Elysium" official Rhodes, a ruthless ruler, strictly enforced the laws prohibiting immigration and forced the poor to live on the earth for generations and never turn over. Private Max, played by Matt Damon, is given a difficult task. He will return to earth to fight for the protection of Elysium. When he came to the earth, he found that his life was threatened, and the difficult situation of the earth people made him feel pity. Where will his fate go? Is it possible for two seemingly isolated worlds to reverse?