I’ll meet you: without googling I believe that is a work transfer system with China. I think it’s rail based, and I think they stay for some time.
But they aren’t free to go where they please, or leave the region entirely without ramifications.
Edit cause I was honest: I was wrong.
But are you purporting this agricultural system as effective?
Further I assume you bring that no fact up as argument that collectivist style policy is effective and happening, I would argue it is ineffective and still only a farce under authoritarianism. Else why would nk receive aid, and experience famine?
Lastly, I don’t need to know the economic history of the country to know where they are now. It’s not propaganda that got me here, it’s their own words and reports.