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The Great wall of china
The Great wall of china as called is the largest building construction ever carried out, running to around 6,400 Km east to west from gulf of china to the yellow sea to a point in Central Asia. The construction of this fortification dates from 4th century B.C. shih Huang-ti in 214 B.C.
First Construction of the Great Wall:
The first emperor of United China connected the discontinuous walls with watch towers with was used to guard as the rampart. It was mainly built against Hsiung-nu or called he Huns. The wall was constructed partly of masonry and partly of earth and was faced with brick in the eastern portion. It was again rebuilt in the 15th and 16th century. The basic Wall is 30feet height and the towers are 40m high. The great wall lies from 39.49 degrees North to 98.18 degrees East. The Yen Mountains are the world famous ones and has peak up to 4,900 feet above main sea level. The great wall has it crest over these mountains in a zigzag manner. According to the words of the Astronauts and space researchers, the only clear and visible one from the moon on earth is only The Great Wall. A statement said The Great wall is the only visible thing from Satellite.
China was the only country with the oldest civilization and it led up to 2000 Years from 221 B.C. to 1911 A.D. and remained as a united one until the series of powerful rules. The great walls construction was carried on only during this period and the main reason why the wall bent at some occasions was this because the capitals were shifted, the borders were changed and mainly the country was captured by fierce tribes of the period including the Mongols and however for the most of the history of china, it was the only developed country of that period in art and technology only because of its construction of the great wall. The inventions of paper, porcelain and gunpowder were the main during the construction of the great wall. The inventions of paper, porcelain and gun power were the main construction items used during the construction of great wall.
After the construction of the great wall the Qin empire was the first empire to be protected by the great wall which is now the northern and eastern china. The wall was built there as a defense against the Hostile tribal attacks from central Asia. The Qin warriors used to walk on the walls as security and the warriors from the great wall attacked the enemies and this was mainly the reason for the expansion of their empire. The great wall is still now the longest man made structure on earth. It was built before 2,200 years with about 3,00,000 slaves. More than 90% of the slaves who built the great wall were brought from Macao a tiny peninsula in the southeast china and was a Portuguese colony at that time. It was returned back to china in 1999. It was a famous tourist center at that time and cheap labor was available there.