Mainlanders working in Tibet for a long time can only adapt to the plateau climate environment, let alone keep in good health, because working in Tibet for a long time, first, hemoglobin increases, second, ventricular enlargement, especially left ventricle enlargement, third, brain cell edema, poor rest, and memory decline after a long time! Especially in Tibet for a long time, these will cause temperament diseases. People in high altitude areas will not live long, and no one can change the natural environment.