system
Given the following post, respond as if you're commenting on Reddit:
human
What's Up with China's Demography Bomb?

Why do people keep saying China has a demography bomb with its super lower birth rate when China's birth rate is the same as the US and a lot of other countries 1.75ish?
gpt
It's because China had a birthrate of 5 in the 1970s while the USA has had a pretty consistent birthrate of 2 since the 70s. This means over time as the birthrate drops in China a bigger gap appears between elderly and youth. Because of the one child policy this drop occured significantly quickly. A country would typically fill this gap with targeted immigration as the USA had done this entire time. China didn't do this and now has too many elderly people that require expensive services and too few young workers to pay for those services. The US on the other hand has been filling this gap as much as it can over decades and still is going to be hurt by demographics discrepancies. It may be China's biggest challenge domestically because it isn't something you can simply get your country out of. It takes decades of planning either through domestic birth incentives or high immigration. China just seemed to of been blindsided by the issue until very recently.