中华大地在四、五十万年前已有原始人居住。从传说中看,有居住在南方的蛮族,居住在东方的夷族,居住在北方的狄族和居住在西方的羌族和戎族。他们先后进入中原地区,共同创造了灿烂的华夏文化。《礼记·礼运篇》称这种原始社会为“大同”,“大道之行也,天下为公,选贤与能,讲信修睦。故人不独亲其亲,不独子其子。使老有所终,壮有所用,幼有所长,……是谓大同” The vast land of China has primitive people four or five hundred thousand years ago. From the legend, there are barbarians living in the south, barbarians living in the east, tribe living in the north, and Qiangs and tribes living in the west. They have successively entered the Central Plains region and jointly created a brilliant Chinese culture. “Book of Rites etiquette articles,” said the primitive society as “Datong”, “the road trip also, the world for the public, the election and the ability to say good faith, reconciliation, so the people are not close relatives, not only son. The old end, strong use, young director, ... ... is that Datong ”