https://www.quandl.com/data/WORLDBANK/CHN_SP_URB_TOTL-China-...
https://www.quandl.com/data/WORLDBANK/USA_SP_URB_TOTL-United...
Census in 2000 in the US reported 79% of Americans living in Urban Areas. It is surely even higher now.
To make an edit: I think we're arguing over semantics of terms at this point. I don't think we're actually disagreeing about anything important. I never asked for China to be called urbanized (although I would use that term if forced to use one or the other), just that calling it 'rural at its core' doesn't hold up anymore. If you still think that statement holds true, then I'm sorry that we're going to have different definitions of that term.
China is now majority urban (more people live in cities than on rural land) and has been for a few years now.