When it comes to sustainable urban growth, Hong Kong has been a noted success story and possible model for mainland China and other emerging economies. The city’s emphasis on infrastructure has been its traditional path to development, with new towns and a mass transit railway in the 1970s and 1980s, airport and seaport development in the 1990s, and increased bridge and rail links to mainland China in the 2000s. Hong Kong has also enjoyed the flexibility to experiment with greener, socially conscious, and more sustainable development at its own pace.