Why is Communist China defeating Capitalist America in terms of economy?

China is communist politically, but capitalist economically. They are not defeating us economically at all. Their per capita income is far below ours. They do have more billionaires than we do, but that is a potential time bomb, not an advantage. Most of the Chinese cannot afford most of the goods we take for granted, while a select few can buy things most Americans can only dream of. That would in time create social unrest, and in fact it has, but the government is trying to crack down on it. It takes an authoritarian government and a police state to enforce unequal wealth distribution. People who complain about cancer causing industrial pollution and unsafe school construction find themselves in jail, and the victims of the milk powder poisoning remain largely without compensation. Is that better than we have it? I don't think so.