China has a population of 1.3 billion, how come the United States only has a population of over 300 million?

The population base is different. China has been an agricultural country since ancient times. The larger the population, the more productive it is. There was no large-scale plague like the Black Death in Europe, and of course there were more and more people. The United States is a colonial country with a small population. In addition, Americans are accustomed to marrying later, so the age of childbirth is naturally later than in China.

The base is small and children are born late. Even if the United States and the United States work hard to have children, they still can’t catch up with China’s population