What was common in the natural conditions of China, Egypt and Mesopotamia?

What they have in common is that each of the ancient states had a large river. In Egypt it was the Nile, in Mesopotamia it was the Tigris and Eurfat, in China it was the Yangtze and the Yellow River. Thus, the civilizations that arose in these territories are called river civilizations. It was thanks to the river that the ancient peoples received a lot of means for living: water, fish, river transport, irrigation of lands with river waters, etc.