Seoul: population  more than 10.2 million
Seoul: capital  South Korea
Seoul: is  world's largest city  terms  population
Sao Paulo(Brazil): world's second-largest city
Sao Paulo(Brazil): has  population   over ten million
Three other cities: have grown to more than nine million people.
Bombay(India): have grown to more than nine million people.
Jakarta(Indonesia): have grown to more than nine million people.
Karachi(Pakistan): have grown to more than nine million people.