Xia Boyu, a 69-year-old Chinese mountaineer, has becomes the first disabled climber to scale Mount Qomolangma in China, the highest mountain in the world known as Mount Everest in the West.In 1975, Xia gave his sleeping bag to a companion, which caused his legs to become frostbitten and amputated.After that, Xia has suffered from cancer, avalanches, major surgery and other