Gang Fan provides another insightful piece on China's urbanization.
He analyzed why China's urbanization rate lags behind other countries with similar development level – he attributed this to China's Hukou system – most readers will find nothing new on this account. More interestingly, he shared his view on why China does not have urban slums as typically found in other developing countries with large mass migration. This has something to do with China's land tenure system.
For a graph on China's urbanization gap, you may find my previous post useful.