The Great Wall of China is a construction that is 21,196 kilometers long. It is 8 meters high and 4 meters wide.
It starts in Gansu Province and ends in the Gulf of Bohai.
Given its architectural grandeur and history, it is considered one of the Seven Wonders of the Modern World. For this reason, it is one of the main tourist attractions in China, receiving more than 4 million visits per year.
The Great Wall of China is so extensive that it can show up on radar images taken in low earth orbit. But, contrary to what has been reported by many, it does not may be view da Moon .
The Great Wall crosses valleys and mountains across the country's 11 provinces and the autonomous regions of Inner Mongolia and the Hui Nationality of Ningxia.
History
The Great Wall of China was built to consolidate the empire from Qin Shihuang . Before gaining control of China, the Chinese states each had their own wall.
To show that China was one, the first Chinese emperor - Qin Shihuang - ordered the construction of the Great Wall, which was built over four dynasties:Zhou (1046 to 256 BC), Qin (221 to 207 BC), Han (206 BC to 220 AD) and Ming (1368 to 1644).
She had how goal protect the country dos invaders and also occupy men rioters and soldiers who with the end of the wars were out of work.
About 300,000 of these workers, who totaled more than one million men, died as a result of their working conditions.
The work was only finished about 2200 years ago, that is, hundreds of years after its beginning, because it was stopped for some period.
In the Han dynasty, Emperor Liu Bang used the building not only as military protection, but also to regulate the silk trade.
Over the dynasties, the building was repaired, but no maintenance effort was as strong until the 1980s.
Despite this, the Great Wall is deteriorating. This is because a poor restoration of its construction is carried out, whose materials used vary according to its location. It can be said that part of it is made of stone blocks, rammed earth and bricks.
Another factor that leads to its downfall is the depredation and theft of bricks. According to scholars, around 14,000 kilometers could be at risk.
The wall links nearly a thousand forts. Therefore, along it there are windows and doorways (spaces where cannon muzzles are placed). There are also platforms that served to attack enemies and almenara towers from which communications between the military were made.
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