When the Earth's Oxygen Disappears

The disappearing oxygen, the disappearing ozone layer, the desertified land, and the purple sky outline a hot planet with strong radiation and little vitality! Only the howling wind seems to be wailing for the collapse of human civilization. This is the harsh living environment faced by Fengjun, the world's first new cyber human being to combine humans and AI. His only goal is to survive tenaciously... (Pure hard science fiction, with logic and brains, welcome to collect, please feel free to read!)