东渐于海,西被于流沙,这是大禹治水的路线,也是长城的基本走向。沙漠与长城有着不解之缘,许多长城就修建在沙漠的边缘。这并非巧合那么简单。青藏高原隆起是一个特殊的地理现象,我们据此推断,现在的沙漠地带曾经是大水所在的地方。黄河的源头与长城的起始是一致的,甚至,长城与黄河也一直相伴而行,从源头起步,到东入大海。 East gradually in the sea, west was quicksand, this is Dayu flood control line, but also the basic trend of the Great Wall. The desert has a bond with the Great Wall, and many Great Walls are built on the edge of the desert. This is not a coincidence that simple. The uplift of the Qinghai-Tibet Plateau is a special geographical phenomenon. From this we can infer that the present desert areas were where the floodwaters were once located. The origin of the Yellow River is consistent with the beginning of the Great Wall. Even the Great Wall and the Yellow River have been accompanying each other all the way from the source to the east into the sea.