From the 1921 British expedition to conquer Everest for the first time, there have been 600 or so mountain warriors have set foot on this world's highest mountain peaks. Meanwhile, there are 140 people sacrificed their lives. May 1996 disaster in mid-wrote the history of the history of human conquest of the most tragic scene. In 36 hours, there are eight people were killed, including the world's best climbers.

Painful as the experience, it is a careful analysis of the reasons for the tragedy in the mountains before finally recognize a life-threatening several factors. They include:

Cold: This is in high latitudes and alpine zones caused by died in the "number one killer." In mid-May of this year, it is time to climb Mount Everest this season, the gold, but the sudden to the Blizzard in a very short period of time so that the peak in the vicinity of the temperature dropped to - 40 ° C, and causing a great deal to the summit damage. Extreme cold can be a large number of people due to loss of body heat, heart movement slowed down, finally leading to death.

To this end, a number of developed countries, specially designed for mountain climbers with a good insulation of the winter clothes, in order to reduce the body heat dissipation. The human body in motion, muscle jitter can produce heat, protecting the heart and body. Oxygen loss: It is the determination of Qomolangma peak of oxygen in the atmosphere at sea level is only one-third of oxygen in the atmosphere. People tend to cause fatigue, lack of oxygen at low altitudes, people only need to breathe 12 times per minute, while in the peak in the vicinity, we must be sure that the body breathe 50 times the normal oxygen needs, to ensure that the lungs of carbon dioxide emissions in order to increase the oxygen content in the body.

At present, apart from some special mountaineering items, most of the mountaineering expedition team members are equipped with a lightweight and solid oxygen bottles, used to increase the safety of mountain climbing.

Dry air: Although the Department is often snow-covered peaks, but there is a very dry wind, the climbers will be lost each time breathing body of water. According to estimates, climbing tall peaks such as Everest, because of breathing caused by water loss in the human body in the blood may be over 15 to 40%. In high-latitude regions, the increase in red blood cells in the blood cause the blood to become sticky, so that may increase the chance of frostbite. Moreover, dry winds and severe cold often accompany. In the normal climbing activities, in addition to climbers with enough water, it also often with convenient, efficient stoves in order to melting snow water, replenish the body water loss.

To judge the mistakes: the increase in altitude, the human brain would cause some adverse effects, resulting in instability of human emotions. Is easy to produce mental confusion, leading to misjudgements, or even suicidal behavior. These adverse factors, in preparation for climbing fully taken into account.

Experienced climbers, after reaching a certain height, usually used climbing knot group tactics. This in the face of danger, can be close cooperation between team members, care for one another, to the phase, and working together to overcome difficulties, courageous Shangpan, safe descent.