There is a super huge piece of land. Due to the high altitude, cold climate, and thin oxygen, it has become an area unsuitable for human survival. But even so, it was still overcome by humans, who lived for generations, lived a nomadic life, and gradually adapted. However, if you are not aboriginal, if you want to live here for a long time, in addition to enduring altitude sickness, you must choose a low-altitude area as much as possible, because places above 5,000 meters above sea level are "forbidden areas for human life".