China has ~1.3 billion people, but “most of people in the world” don’t live in China. That would mean over 50% of the world’s population. Maybe the sentence is just worded poorly, or it was written by someone whose first language isn’t English.
Rio de Janeiro was the capital for almost 200 years, but in 1960, the capital was moved to Brasília, a city that was founded for this purpose. Today, Rio isn’t even the biggest city, São Paulo is way bigger.
China has ~1.3 billion people, but “most of people in the world” don’t live in China. That would mean over 50% of the world’s population. Maybe the sentence is just worded poorly, or it was written by someone whose first language isn’t English.