China's government might not want to continue with their high urbanization policy in the future. Perhaps they want to keep, say, 20% of the population in a poorer rural environment so their country won't have to bring in migrants to do the work migrants traditionally do in richer countries and territories like the U.S., Hong Kong, and the UAE.

Yes. And I think it's dumb. The article linked to states it in alternative words "low and middle income country LMIC". I think that's an order of magnitude better.

I know I'm nitpicking and being an asshole about this point, but I think words matter. How we talk about things feeds in to how we conceptualize things and our mental models are like low quality, compressed, cartoon versions of reality and getting them more accurate at a fundamental level goes a long way towards improving the end results of our cognition.

It also used to be called First World, Second World, Third World. It's not anymore. Discourse changes because people stop agreeing on terms being useful, accurate, or good.

I liked Hans Rosling's level 1,2,3,4 stratified model a little better.