Usually, the cause of plateau reaction is because people who have been living on the plain for a long time enter the area above 3000 meters above sea level quickly, they will have pulmonary edema and cerebral edema caused by low air pressure. However, people who often live on the plateau do not have the process of quickly entering the higher altitude surface from the plain, so they do not have the situation of not adapting to the low air pressure that causes plateau reaction. People who often live on the plateau usually adapt to the air pressure, airflow, and insufficient blood supply to the heart and reduced oxygen saturation of the lungs caused by low air pressure, so the absence of plateau reaction does not mean that there will be no cardiopulmonary insufficiency caused by being in the plateau area for a long time.