The Great Wall of China, one of the Seven Wonders of the World

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The Great Wall of China, one of the most impressive man-made projects in the world, lies on the northern part of China like a big sleeping dragon winds through north China's vast territory. With a history of over 2,500 years of Wall attracts visitors from all over the world. In 1987, Great Wall has been on UNESCO's World Heritage List are listed and selected as one of the new seven wonders of the world in a global poll to 7 Announced in July 2007. It is often said, "IfYou have not climbed the Great Wall, you have not China. "Most people see in the world have seen photos of the amazing design, but photos are poor imitations of the beauty and grandeur. No China trip is complete without seeing, the Great Wall. Visiting it is the experience of life.
The construction of the Great Wall began during 770-476 BC. During this period, built to defend Ducal states walls around their territories. In 221 BC, Qin Shi Huang conquered the six kingdoms and unified Chinabecome its first emperor. To consolidate the country and ward off invasion by ethnic minority tribes in the north, he had connected the various walls together and expanded to form a common defensive front. The construction lasted until the Ming Dynasty (1368-1644), when the Wall was the world's largest military structure. The current measurement of the Great Wall, which extends from Shanhaiguan Pass in Jiayuguan Pass in the east, west, is 7300 kilometers (4300 miles). Its thicknessin the range of about 4.5 to 9 meters (15 to 30 feet), and at its highest point is 7.5 meters (25 feet) high. Most of the walls that we see today, during the Ming Dynasty were built. The towers are at intervals of 1,500 feet except where the terrain is built more complicated, and they are even closer. In the old days were monitored daily to ensure thousands of soldiers there that the whole nation was stationed safely. At night they slept in the towers.
Its historic and strategic importancematched only by its architectural significance. It is built from locally available materials - stone, rammed earth, large granite blocks and bricks. The Great Wall is not only the walls but also from outside, beacon towers, watch towers, castles and fortresses. Along the 7300 km (4300 miles) long wall, there are countless beacon towers that were used as a signal box to deliver messages from one place to another. When the enemy entered a day, heavy smoke was asa signal during the night, would make a great fire kindled, because fire was easy to see at great distances. The extent of the smoke and fire signals could show the number of invading enemies. The beacon towers were placed at regular intervals along the Great Wall, and each tower at the sight of a signal from the previous one would be their signal light tower to the next signal. A signal can be sent from one end of the wall to the other, a distance of 7300 kilometers (4300 miles) in just over aHour.
The Great Wall was constructed using the Chinese People's sweat, blood and muscles. Old records show that at least one million slaves and prisoners of war were recruited, the Great Wall, which followed the contour of the land to build taking advantage of the natural landscape. How many died of exhaustion and starvation while working on this colossal task, the wall was also known as "the longest cemetery in the world." had the bricks, stones and lime used to build the wallthe mountains worn on bare back. Those who climb the wall now have succeeded often regarded as "true heroes", but as a visitor to the difficulty of climbing the wall to realize, they should try to imagine how difficult it must have been, the Great Wall without modern to build machines.
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