A picture is worth a thousand words:
This is where an average Chinese middle class hangs out.
This is where the average American middle class lives.
That's a quarter of the Chinese upper middle class.
This is what an upper-middle-class American neighborhood looks like.
A house in a Chinese village
Another house in a Chinese village
An American country house.
Another American country house.
P/S
I want to use these pictures to show that houses in the USA offer more living space for certain social classes than houses in China. In urban areas, an average family would likely live in an apartment building rather than a country house. In rural areas, there is a difference between houses in a rich and a poor village, but even there, living space is rather limited. Here are some more pictures of villagers from different parts of China.