Great Wall of China

Great China wall is a defensive military are rarely prominent and ancient history of human
architecture.Great China wall is a symbol of the Chinese nation, not only show the intelligence of Chinese ancestors, but also reflects the effort made by the sweat and blood. He has a reputation in the world history and ancient fortifications, and the magnitude of greatness and strength. Began building the reat Wall of China during the Spring and Autumn and Warring States era more than 2000 years.Start of the corridor wall, Jia Yu Guan Gan Su Province, and ends at the west corridor Shan Hai Guan Province, He Beast through high mountains, like a giant dragon lies on the territory of the vast North China. It is the oldest and largest defense project in China and the world. Included in the list of world cultural heritage by the UNESCO, the United Nations in 1987. Started in the various kingdoms in the Spring and Autumn (from 770 BC. M to 476 BC.)And the Warring States era (from 475 BC. M to 221 BC. M) building walls on its border to defend itself, and become the oldest part of the walls of the Great Wall. In the year 221 BC. M limit Emperor Shi Huang Di thewarring kingdoms, and founded the first unified state with a central authority in the history of China, the Chen family ownership. In order to stabilize the border to repulse the aggression national minority Xiong Nu, which had been living in the areas f property north of the Qin Dynasty, Shi Huang Di link fences that were built in the Warring States, which sure Chen family property, which was long, more than 5000 km and starts from the eastern province of Liao Ning East China and ends at Tao Lin Gan Su Province, west China. After that, I have continued to successive royal families in China, building the walls on this basis, exceeding the length of the walls built by the Han Dynasty and Ming Dynasty Royal 5000 km. The total length of the walls built by the various royal families 50 thousand kilometers.

Great China wall is not a defense only, but is an integrated project consisting of defensive walls and defensive towers and control strategic corridors and the barracks of the soldiers and warning towers and other defense facilities. And control of the project leader, a military defense system consists of an integrated different levels. Take Wall of China in the imperial Ming Dynasty as an example, this fence, which begins Ialoh east of the river and ends at Jia Yu Guan Pass west total length of 7000 km is divided into nine administrative regions, military and each of the chief executive of the separate management and is responsible for the reform of the wall within the region and restoration is also responsible for defense affairs in the region and help the areas adjacent to military affairs and defense according to the order of the Ministry of National Defense. The number of soldiers stationed on the wall in the Ming Dynasty property amounted to about a million troops

The walls extended a key part of the

defensive wall of China. The walls were built high above the mountains, or dangerous locations Balshol by geography and the defense needs. The walls are often built in the plains or places important to the high and very strong, and the walls built on hazardous sites over the mountains, it is low and relatively narrow, in order to provide the manpower and construction spending. The average high wall in a corridor Jiuyong Ba Da Guan Ling provinces or within me, He launched Gan Su C and about 7 or 8 meters and the thickness of the base 6 or 7 meters, and the thickness of the top 4 or 5 meters. And built in the inside wall at the top of the wall of an additional one meter in height, in order to soldiers to prevent the fall of the fence, and was built on the outside wall of an additional two meters high, almost, and this upper wall openings and holes of the control infrastructure to fire or drop stones. In the very important areas, the fence is built on the walls to prevent the rise of multi-wall enemies. In the middle of the Ming Dynasty of ownership, added to the fence, observation towers, or buildings for the follow-up observation of enemy movements, housing the soldiers who were patrolling guard or storage of weapons and food. Thus enhancing the defense power of the Wall of China to a large extent.

The best pieces reserved Wall of China (north of Beijing)

Corridors is the most important strategic positions on the defensive line of the fence route for tens of thousands of kilometers. The lanes are usually in positions of strategic fit for the defense to resist the aggressors, many military forces of a few. There is an old Chinese saying that "if there had been a soldier and defend at the strategic corridor, there can be no proof that the ten of thousands of soldiers." This example demonstrates vividly the importance of the strategic corridors. A large number of strategic corridors for big and small on the Wall of China. And take the Wall of China Ming Dynasty as an example, there were approximately Istruthristi A corridor on the wall, and the Netaid Shan Hai Guan Huang Ya Guan and Yong-Jiu Jin Guan Guan Ze and the Dow and Ping Guan Xing Guan Yan and Guan Guan statement Jia Yu Guan in addition to

Yang Guan of Guan Yu, who built in the era of the Han Dynasty (the word means "Guan" in Chinese strategic corridor).

Warning towers are also an important part of the components of the defense of the Great China wall. It is

the facilities to send and the transfer of military information. In fact, the warning towers as a tool for the transfer of information have existed since ancient times, and learned since the beginning of construction of their Wall of China was good, but to be completed gradually become the best way to send and the transfer of military information in the ancient times. The method of information transfer is the release of smoke by day and set fire to the night. It is a scientific method and the rapid transfer of information can determine the number of enemies of the number of sites set out tobacco or set on fire. In the era of the imperial Ming Dynasty were the voices of explosives at the time of release of smoke and set fire to enhance the effectiveness of warning, which can be accurately informed of the military information to distant places and different at the same moment. In the absence of phones and wireless communications in the ancient times, it can be said that this method for the transfer of military information has been very rapid.

The coordination sites warning towers is very important. It is all in the dangerous places on the tops of the mountains, and must correspond to three sites with each other to facilitate the transfer of information.

Great China wall is different geographic terrain and complex, which reflects the mountains and cliff and runs through the desert and passes through meadows and rivers go. Therefore, the architecture of the fence is also different and strange, since the fence was built in the desert areas of the material is composed of local stone and a special type of willow, given the scarcity of rocks and bricks. The plateau in the north-west of the yellow soil of China, built the fence or brick dust Almdcock non-burned, but solid and strong at least the strength of the wall built with rocks and bricks. The fence was built in the Ming Dynasty property often rock or a brick or a combination of brick and rock. There is a channel to divert water to the summit of the wall to divert the rainwater and the protection of the wall automatically.

In addition to the role of the military, the impact of the Great Wall of China onChina's economic development as well. The direction of Wall of China almost identical with the dividing line between the climate is wet and the dry climate in China, and in fact draw a line between the areas of agricultural and nomadic areas. In ancient times, was living in north China's national minorities a Bedouin, and the Han people living in central China, to protect agricultural production and prevent the looting of the nomadic nationalities to their farm products, the Han people are building the wall constantly. The Great China wall has become a barrier to the development of two different independent.

Among the tourist sites on the Great China wall across China, the Wall Ba Da Ling, north of Beijing, the best pieces reserved Wall of China, and is one of the best sites to climb the fence of the Chinese tourists and foreigners.