didn't the ussr squeeze those farmers so tight to get industral equipment out of the capitalists by trading grain? yes, the capitalists graciously supported the ussr, the cold war was actually a big hug!
because they traded with capitalist nations they couldn't have existed without capitalism. sure, actually that was the theory at the time, that industrialized germany would join them in a mutually beneficial relationship. that didn't happen for some reason.
but what if we flip it? because capitalist nations traded with slave states and feudal nations, they couldn't have existed without slavery and feudalsim. because capitalist nations trade with violently repressive plutocracies, they can't exist without violently repressive plutocracy. seem fair?
how were china and the ussr organized is the actual question.
maybe you assume technological development was caused by capitalism. personally i think that's putting the cart before the horse.