By Bobby Yip

Those who have visited Hong Kong know how packed the buildings are, how busy the traffic is and how quickly people walk. When there was a global photo project on the world’s population reaching 7 billion, the first image that came to my mind was Mong Kok – one of the most crowded places in the world. The Guinness World Records lists Mong Kok as having a population density of 130,000 per square km or 340,000 per square mile.