How did geography influence culture and technology in Mesopotamia and China?

This is a
fantastic question. 

Let me made a general statement first about culture and
technology. When there is culture in the ancient world, technology follows. This is the case
with both the great civilizations of China and Mesopotamia. 

Now as for
geography. 

Both civilizations were able to flourish, because they were
great river societies. For example, in Mesopotamia the land is between the Euphrates
and...