Brief introduction of Great Wall Great wall of China was an ancient gigantic defensive project. It is one of the largest construction projects ever completed. Great Wall of China is one of the greatest wonders of the world. It winds its way westward over the vast territory of China from the bank of the Yalu River and ends at the foot of snow-covered Qilianshan and Tianshan mountains. It is seldom that we see such a gigantic project in China or elsewhere in the world. The Chinese call it the Wall of 10,000 li. Its size is better seen on a map or from an aerial photograph. According to astronauts who looked back from the moon, of all projects built by man, the Great Wall of China is the most conspicuous seen in space. Present Great Wall of China Today, the Great wall has lost its strategic importance and has become a world-renowned tourist attraction. The laboring people of different dynasties demonstrated their intelligence and wisdom while building this great project. They left behind a precious heritage deserving our everlasting care. Badaling section, Juyong pass and Cloud Terrace were listed as important historical monuments under special preservation by the Chinese government in 1961. The Great Wall was listed by UNESCO in 1987 as one of the world heritages.