What are the features of the civilization of Ancient China?

Ancient China arose on the basis of Neolithic cultures that developed in the 5-3 millennia BC. in the middle reaches of the Yellow River. The Yellow River basin became the main territory for the formation of the ancient civilization of China, which for a long time developed in conditions of relative isolation. Only from the middle of the 1st millennium BC. the process of expansion of the territory begins, in a southern direction, first to the area of ​​the Yanza basin, and then further south. On the verge of our era, the state of Ancient China extends far beyond the Yellow He basin, although the northern border of the ethnic territory of the ancient Chinese remains almost unchanged.