Plateau people generally don't have altitude sickness. Altitude sickness is the manifestation of hypoxia caused by thin oxygen. Because the local people have lived on the plateau for a long time, they have adapted to the thin oxygen environment and will not have altitude sickness. If you live in the plain for a long time and suddenly come to the plateau with thin air and low oxygen content from an oxygen-rich place, the human body will temporarily be unable to adapt, and will produce a series of natural physiological reactions and adjustment changes, gradually adapt to the hypoxia environment at the plateau and produce altitude sickness.