Cultural Intercourse Between China and the Western Regions Before the Qin Dynasty

During the primitive social and matrilineal communal periods, humans formed different groups and engaged in activities in different regions, thus creating various civilizations. Due to the limitation of activity ability, people from different groups have very few opportunities to contact each other, and the information of cultural transmission is fragile, so they have to be in the Paleolithic era, which used coarse stone tools for millions of years.