Street cleaners at work in Central, the business district of Hong Kong. Many old people have to work as rubbish collectors to survive. Hong Kong is one of the world's leading financial centres along side London and New York, it has one of the highest income per capita in the world as well the moste severe income inequality amongst advanced economies. 7 million people live on 1,104km square, making it Hong Kong the most vertical city in the world. (Photo by In Pictures Ltd./Corbis via Getty Images)
