To compare, 2024 (UN) fertility rates (highest-lowest):[1]
US: 1.62
Japan: 1.23
China: 1.02
ROC: 0.86
ROK: 0.75 (where an increase to 0.8 in 2025 was cause for celebration, as is a predicted increase to 0.85 by mid 2026)[2]
Alternatively (and perhaps accounting for migration etc), UN 2024 forecasts population differences in these countries between 2024-2050 as:[3] US: +10%
Japan: -16%
China: -8%
ROC: -6%
ROK: -12%
[1] https://en.wikipedia.org/wiki/List_of_countries_by_total_fer...[2] https://www.chosun.com/english/national-en/2026/01/24/IVHGRT...
[3] https://en.wikipedia.org/wiki/List_of_countries_by_past_and_...
China's one big advantage over other work forces is massive amounts of labor that can be directed by central planning. As their labor costs have gone up, labor intensive manufacturing has already started shifting away. When population declines cause labor costs to go even higher, they lose their advantage.