I updated the populations for all cities, but Chongqing is still only about 8.4 million. I made a mistake in the description and this quiz is the urban area population, which is the metro area plus all of the surrounding suburban population. Regardless, the urban area population should be greater than the city proper population. This is according to citypopulation.de so let me know where you got a higher population for Chongqing.
The City proper population for Chongqing is over 30 Million, because Chongqing's City boundaries are huge and include other "Cities", kind of. The area of the City of Chongqing is 80.000 km².
Updated to reflect data from citypopulation.de to be consistent with other jetpunk quizzes such as this: https://www.jetpunk.com/quizzes/biggest-cities-in-china-quiz
I'm not sure which source shows Chongqing with a population of more than 30 million, but the urban area according to citypopulation.de is ~10.5 million.
Chongqing's 30 million population comes from the combined urban and rural population within the entire jurisdiction, which is different from the urban area population.
I'm not sure which source shows Chongqing with a population of more than 30 million, but the urban area according to citypopulation.de is ~10.5 million.