Subscribe and 🔔 to the BBC 👉 https://bit.ly/BBCYouTubeSub Watch the BBC first on iPlayer 👉 https://bbc.in/iPlayer-Home Ade heads into the high rises to find people living in tiny spaces no larger than a cupboard. Dan Snow, Anita Rani and Ade Adepitan reveal the hidden systems and armies of people running Hong Kong - one of the most densely populated places on earth. This time, they are in Hong Kong, where space is at a premium and real estate is the most expensive in the world, so Ade heads into the high rises to find people living in tiny spaces no larger than a cupboard. Hong Kong: World's Busiest Cities | Series 1 Episode 1 | BBC #HongKong #WorldsBusiestCities #BBC