Ten of the 14 mountains with an altitude over 8,000 meters are located in the Himalayan Mountains in Southwest China's Tibet autonomous region. Towering 8,848 meters above sea level, Mount Everest is the tallest in the world. However, it is not only its height, but also its magical landscapes that have ignited enormous interest among adventurers around the world.

One of the most attractive and unique phenomena is the banner-shaped cloud that floats above Everest. From a distance, the cloud looks like a flag or banner fluttering on top - hence its name qi yun ("flag cloud") in Chinese.

But the cloud's shape varies a great deal: It can be as violent as surging waves or as gentle as smoke from a chimney. Such elements add glamour to Everest's spectacular landscape.

The special banner-shaped cloud is generated from the surrounding geological and climactic conditions that are unique to Everest. The banner shape usually appears in the daytime and disappears in the evening.

For the experienced alpinist, the banner-shaped cloud is also a very good indicator of weather conditions. The position and height of the cloud can help predict wind power at the top of the mountain for climbers. When the cloud rises, this indicates that the winds are not very strong, and vice versa.

The transformation of the cloud usually reflects a change in the air current at higher altitudes. Therefore, the banner-shaped cloud above Everest is also reputed as the "world's highest vane."