(Sony A55) According to this statistics , Hong Kong is the fourth most densely populated place in the world. Fact is, it should have ascended to the winner's throne since a large part of the territory is designated as country park where no development is allowed. Take for example our most densely populated district, Kwun Tong. Its population density is a terrifying 54 530 persons per square kilometre as at 2010 (For comparison, world’s most densely populated Macau has 19 610 per square kilometre). Today’s shot of a typical old residential tenement building in Kwun Tong gives a glimpse of how crowded the place is. Such tenement buildings of five to six storeys are mostly built before the Second World War and are therefore generally known as pre-War buildings.