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The Great Wall , symbolizing China¡¯s ancient civilization is one of the world¡¯s most renowned projects. Construction of the wall began during the 7th century B . C. the Spring and Autumn Period and the Warring States Period ( 770 ¨C 221 B. C. ). It extends from Shanhaiguan pass in the east , a seaport alone the coast of Bohai Bay , to Jiayuguan pass in Gansu province in the west . It¡¯s total length is more than 6,700 kilometers . Badaling section lies in the Yanqing country in Beijing, is the highest point of the wall, 800 meters above sea level . |
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