What is the biggest city in the world?

In terms of population, Tokyo is currently the largest city in the world. Together with the agglomeration, the Japanese capital has a population of an impressive 37,468 million people, which is only about half a million less than the population of the whole of Poland. However, if you do not take into account the metropolitan area, but only the administrative boundaries (the so-called proper city), then the largest city in the world will be Chongquing in central China. It is inhabited by over 12 million people (in the agglomeration 31). \