Great Wall of China (Chinese: 万里长城) is the wall extends to the north-western and northern
borders of China (PRC), of Chnhuangtao on the Gulf of Bohai Sea (Yellow Sea) in the east to Gautay area in Gansu province in the west. Another wall has been built to the south, and extending from the Beijing area to Handen. And the length of the Great Wall of China is the 2400 Clio meters [1], and the Great Wall of China is one of the most important World Heritage Site and was selected as one of the wonders of the new seven in the world in a survey of international opinion in 2007. Great Wall of China has become the most important things that need to be seen for for visitors and tourists flock to him. Where people from all over the world every year. [2]
The Great Wall of China is a legitimate defensive military past and rarely a prominent architect in human history. It is a symbol of the Chinese nation, not only shows the intelligence of Chinese ancestors, but also embodies the effort exerted in which race and blood. In the world and is known for its history and ancient fortifications and the magnitude of his greatness and strength. Began building the Great Wall of China during the Spring and Autumn and Warring States era more than 2,000 years.
The Great Wall of China is not just a wall, it is an integrated project consists of defensive walls and watchtowers defensive strategy and arcade barracks and soldiers and warning towers and other defense installations. The controls on this project integrated defensive military leadership consists of different levels of the system. Take Wall of China in the Ming Dynasty as an example, this was the fence, which starts from the River Alwah east and ends at Jia Yu Guan Pass to the west with a total length of 7000 km is divided into nine military districts, each with a chief executive area managed separately and is responsible for the repair of the fence within the region the restoration is also responsible for defense affairs in the region or help neighboring areas on defense and military affairs, according to the order of the Ministry of National defense. The number of soldiers stationed at the fence line in the Ming Dynasty was about a million troops.
Great Wall of China is going through a different and complex geographical terrain, where the mountains and crosses Alogerv and runs through the desert and crosses meadows and rivers cut. So that the architectural structures and various exotic wall also built the fence as in the desert areas of masonry materials composed of local and special type of willow because of the scarcity of rocks and bricks. The yellow dust in the plateau north-west regions of China, built for the fence rammed earth or mud-brick, but sturdy and strong for at least the strength of the wall built with rocks and bricks. The fence built in the Ming Dynasty often of brick or rock, or a mixture of brick and rock. Channel and no water on the top of the fence distracted for automatically rainwater drainage and protection of the fence. In addition to the military role, the impact on the Great Wall of China is also China's economic development. The direction of the Wall of China was almost identical to the dividing line between the semi-wet and dry climate climate in China, and in fact has become a dividing line between the areas of agricultural and nomadic areas.
