西北是一块古老而神秘的土地,自传说时代开始,华夏先民就在这里繁衍、生息、开发、经营。这里是华夏文明的摇篮。所谓传说时代,是指以文字记载的确切的历史时代之前的时期。这一部分历史是通过先民口头流传的形式保存并由后人零星地记录下来的。口头流传的历史,日久天长,难免加进后人的想象、附会,所以, Northwest is an ancient and mysterious land, since the legendary era, Huaxia ancestors here in the proliferation, interest, development, management. Here is the cradle of Chinese civilization. The so-called legendary age, refers to the exact record of the historical era before the period. This part of the history is preserved in the form orally transmitted by the ancestors and sporadically recorded by later generations. Oral history spread over time, it is inevitable to join future generations of imagination, annexation, therefore,