Table 4: The hierarchy of the 660 cities in PRC and the related measures (2005).

Class (m)City number ( )Average population size ( )Average urban area ( )

 111778.420819.880
 221182.875956.500
 34626.830567.405
 48407.219261.399
 516237.608183.454
 632148.627144.776
 76482.50470.169
 812843.94844.371
 925620.54423.189
 10(149)9.76413.062

Source: The original data are from 2005 Statistic Annals of China’s Urban Construction published by the Ministry of Housing and Urban-Rural Development of China.
Notes: (1) The last class of each hierarchy is a lame-duck class. (2) The unit of population is “10 thousands person”, and the unit of urban area is “square kilometers.”