The Wikipedia census data for Ordos is from 2010, i.e. well before the 2013 article. The ghost city proper is Kangbashi, a new development within Ordos intended to house 300,000 people. In early 2015, the population was estimated at 100,000, admittedly growing but still very much in keeping with the title ghost town.[1]

[1] https://en.wikipedia.org/wiki/Kangbashi_New_Area