China's fertility rate is 1.18 births per woman. US fertility rate is 1.66 births per woman. This is not really comparable. Out of all western nations, the US

China's fertility rate is 1.18 births per woman. US fertility rate is 1.66 births per woman. This is not really comparable. Out of all western nations, the US has perhaps the least problems with fertility. The US both allows immigration (China doesn't) and has sources of immigration of people of relatively close cultural heritage. Also, China is a conqueror, there is only one major territory where Chinese live that is not within China's borders (and MANY where few/very few Chinese live that are within China's borders, even more if you count places where the CCP has control even if they're not within accepted UN borders)