At an altitude of more than 2,400 meters, the atmosphere contains roughly 25 percent less oxygen than at sea level. Ngari's Burang county, where Jin died, lies more than 4,500 meters above the sea. The 30-year-old Jin quit her job two years ago to ...
Beyond manned aircraft, the exhibition also showcased several drone products. The tourism performance fixed-wing drone can fly at speeds of up to 130 kilometers per hour, s...
更多内容请点击：Altitude illness victim's parents say goodbye