The Economist of 23 June, 2018 ran a report on how China is turning itself into a country of 19 super regions, some of which represent bigger economies or populations than certain advanced countries.
As early as March 2011, a McKinsey Report Urban World: Mapping the Economic Power of Cities highlighted the dynamics of the world's leading cities, predicting that as much as 60% of global GDP will be driven by the world's top 600 cities by 2025.
Monocentric gigantic megacities are prone to challenges of congestion, pollution, and socio-economic divide, including slums. What is happening in China's breakneck urbanization, the most rapid and extensive in human history, portrays a different model. Giant cities like Beijing and Shanghai are no longer allowed to exceed a population cap. Many cities are managed to spread their productivity across a hub-and-spoke region or city clusters, linked up by high-speed rail to create a closely-knit living and economic circle within an hour or two's commuting time.
I took part in a panel discussion on Radio Television Hong Kong's Back Chat of 6 July, 2018 to explore the changing dynamics of China's urban city clusters.
Download RTHK Back Chat on China's city clusters (The discussion starts at time counter 3:48)