Humans on Earth, Protection or Supervision?

Human beings on earth have diseases and lifespans. Both animals and humans have physiological defects. They all have the day when their lifespan will end, but the lives of plants are even longer. What is the difference between plants and animals, and why are there such incomparable differences. Oxygen is a necessary substance for humans and animals, so is it good or bad? Is the lifespan limit of human existence on earth human-made or a genetic defect? If it is man-made, then what kind of person caused it. If it is a genetic defect, then where does this so-called gene come from. After Li Ziming experienced his favorite daughter becoming a vegetative state, he began frantic research. He discovered that so-called oxygen is a substance of the lowest quality. It seems to intentionally destroy the energy of human and animal life, thus making them face a life limit. No choice. How should Li Ziming save his daughter, and what difficulties will the people on earth face? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.