> They do not need anything there, that has to be bought for dollars or euros. They are not some third would countries that have to buy their weapons abroad.

they had their local currency forever. yet they developed very fast exactly at the same time as we started buying their goods. its not a coincidence. and yes China is a third world country by all metrics, its not because you have very modern centers like Shanghai, Beijing and more big cities like that that there is not utter misery in the countryside that would make you blush