It's still wrong to call a country with over half its population in cities "rural at its core". It isn't transitioning from a 'rural era' either. It's more urbanized than Slovakia, Romania, Slovenia, and several other developed countries[1].
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.