I'm Delivering Food on the Moon

An unprecedented catastrophe has broken out on the earth. The ground is no longer suitable for animals and plants to survive. 99% Of the human race has been wiped out. There are less than 100 million humans left in the world hiding in a refuge world three hundred meters underground and struggling to survive. Thirty years ago, the vanguard force sent to develop the moon by the World Community of a Shared Future for Mankind took root on the moon. Before the catastrophe, the earth and the moon were closely connected. After the catastrophe, all communications were interrupted. Humans on the earth and humans on the moon developed in different directions. What story will happen to the earth and the moon in the end?