Mount Everest(called Mount Qomolangma in China) Roof is the roof of the world with a height of 8844.43 meters above sea level. In April and May each year, Mountaineers from all over the world gather at the foot of Mount Everest and then set out for the summit. Equipments are transported to Camp No.2 at 6500 meters mainly by yaks. Like humans, yaks have reaction to high altitude.Tsampa balls is made as yaks food and each yak has its quantified carrying capacity...