China's population is a lot more than the population of the entire USA.
As of 2017 the population in China was 1.386 billion people and as of now the year 2019 the population of China is 1,420,519,605 which is an increase from the year 2017.
The USA only has a population of 325.27 million compared to the billion population of China.
India Population is also more than the USA at 1.339 billion people.
In the entire world the population is huge but even just China has more of a population compared to the USA.