Spring and autumn and warring states period, countries for defense other countries invasion, governors, and build beacon tower, forming walls joined up the earliest the Great Wall. In almost all reinforced after king Labour the Great Wall. It is because, for tens of thousands of again called "Great Wall". According to records, qin shihuang used nearly a million labor to build Great Wall, always one of 20 minutes after the total population of the country. There were no machinery, complete work all finished, the working environment by human He mountain ranges, and deep, very difficult cliffs. The Great Wall, shanhaiguan from the west to the east of gansu, as far as the jiayu pass to the yalu river. From east to west through 10 provinces. The Great Wall is the total length of 8842351 meters in length, which artificially wall 6254239.662 meters, QianHao and natural form 25942342.265 meters in length. The Great Wall dates from the spring and autumn period, lasted for 2000 years, total length of 532 meters above. Today we Great Wall of specified referred to the Great Wall built more than for western China, it west gansu province since the as far as the jiayu pass, east to the edge of the yalu river in northeast China's liaoning province, long 635 million meters. It is like a vigorous dragons, the mountains, grassland, by a precipice, wear across the desert, ups and downs in the top of the mountain ranges, the Yellow River shore and bohai sea shore. Prodect who visited the Great Wall, the person all astounded by its epic finale, grand scale and hard work. The Great Wall is a rarities and art special cultural relics, which is the symbol of the Chinese nation in the world will remain invincible strength and is the pride of the Chinese nation, but also the whole human pride.