The Great Wall of China is a series of fortifications made of stone break tempter would and other materials generally built along and east to west line across the historical northern borders are China to protect the Chinese states. The empires against the rates and invasions various nomadic groups have the Eurasian steppe are Donald in verbal several walls were being built as early as the seventh century BC these later joined together and made bigger and stronger are now collectively referred to as the Great Wall.
Especially famous is the wall built to 20 2006 PC by change she won the first emperor of China little up that wall remains since then the Great Wall has on and off been revealed maintained and enhance the majority of the existing wall is from the Ming Dynasty done other purposes the Great Wall. The Great Wall Have included border controls allowing the imposition of duties on goods transported along the Silk Road regulation or encouragement have trade and the control over immigration and emigration well. Furthermore the defensive characteristics the Great Mall green hands by the construction watchtowers troops Fair Oaks garrison stations signaling capabilities through the means have smoke or fire, and the fact that the happen. 
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The Great Wall also serve as a transportation reader my man little on our muddle of the main Great Wall line stretches from Shan hike one in the east to pelage in the West along in our that roughly delineates the southern edge up Inner Mongolia a comprehensive archaeological survey using advanced technologies has concluded that the Ming walls measure 8,850 kilometer 5,500 miles. This is made up of six thousand 259 kilometer 3800 an 89 miles sections over actual wall 359 kilometer 223 miles up trenches and 2,232 kilometer 1,387 miles. Natural defensive barriers such as hills and rivers another archaeological survey found that the entire wall with all of its branches measure out to be twenty 1,196 kilometer 13,000 171 miles.
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