The Great Wall
The Great Wall of China is considered to be the only man-made project visible from the moon. Although it was once thought to have been built entirely during the Qin Dynasty between 221 and 208 BC, it is now believed to have been started earlier.
The 15-foot-high, 25-foot-wide, 1,500-mile-long structure was undoubtedly built to keep out invading enemies. To the common people of the empire, who had been forced to build the wall, it was not worth it, however. The wall, and other public works completed by the Qin Dynasty,had caused great losses of wealth and human life in the country. As a result,an angry population rose up in rebellion against the Qin Dynasty,and in 207 BC the Han Dynasty began.
Because of its rich history and magnificent appearance,the Great Wall attracts tourists, scientists, and historians to this day and will continue to do so for generations.
Qomolangma (Everest), the main peak of the Himalayas, is the highest peak in the earth. At an altitude of 8848 meters, it is located at 86.9oE and 27.9oN. right on the east section of the Sino-Nepal border, with the north slope in Tingri County of the Tibet Autonomous Region, the people's Republic of China, and the south slope in the Kingdom of Nepal. In Tibetan Language, Qomolangma means "Goddess the Third" In the Map of China compiled and illustrated in 1717, the 56th year of the rule of Emperor Kang Xi in Qing Dynasty, Qomolangma was called Zhumulangma'alin (transliteration).
Qomolangma, shaped like a gigantic Pyramid and full of power and grandeur, towers into the sky while the land features are extremely precipitous and the environment usually complicated. The snow line of the north slope is 5800 - 6200 meters and that of the south 5500 - 6100 meters. Three great cliffs, which are generally named the North Cliff, the East Cliff and the Southwest Cliff, are embraced by the Northeast Ridge, the Southeast Ridge and the West Ridge. Between the ridges and cliffs scatter 548 continental glaciers, totaling an area of l457.07 square kilometers, with an area of alpine glaciers exceeding 100,1000 square kilometers. The greatest flannel glacier, 26 kilometers long, has an average thickness of 120 meters with the thickest over 300 meters. The glaciers vary in types, the greatest being of upward 7260 meters in height. The constant supply of the glaciers is mainly offered by the meta-morphism of cumuli-snow of the two great precipitation belts in the monsoon belt of the Indian Ocean. In the glaciers, there are various kinds of surpassingly beautiful and rare forests of seracs (ice towers), cliffs of dozens of meters in height and open and hidden crevasses with lots of pitfalls here and there as well as the perilous area of ice and snow avalanches