system
A chat on subreddit /r/PoliticalCompassMemes
human
One child policy was enforced almost exclusively in cities. Most rural families have like... 4-5 kids.

Logistically this is kinda common sense. China is too big to enforce it fully and it was most important in densely populated areas, not farms and areas where livestock were raised.
gpt
You’re correct but it was in response to rapid industrialization and unfounded fear of overpopulation. So most of the people in the cities were same generation peasants since there was mass waves into the cities