Addressing the original post...
Not precisely homegrown, though certainly evolved in a uniquely indigenous fashion... and certainly not, in either case, constituting "foreign rule".
One might debate the extent to which North Korea can be described as a "Confucian culture".
Are you implying that Nixon's move was the sole cause of China's "start down the path of development"? I think you might find on examination that there was a good more to it than that.
Japan was a developed industrial power well before the US got involved, and I think the case for claiming that "American interference" caused Chinese development is sketchy at best. I don't see any real historical evidence to support the idea that US interference is a necessary element to produce development in an East Asian state.
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