We mentioned how China was building massive city structures, but no one lived in them. It appears that China was hoping to have millions of people from rural towns move into the infrastructures but they were frankly, just too expensive. No one could afford them, so the abandoned cities just sit there deserted or with very few population. It is obvious that anyone will rarely use these facilities for a long time. Yet, China keeps constructing to keep a certain GDP (Gross Domestic Production).
Here are some videos:
SBS Dateline (Australian TV) 2011
60 Minutes 2013