See, for example these articles:
Revisiting the Explosive Growth of Federal Crimes
http://www.heritage.org/research/reports/2008/06/revisiting-...
The Expanding Federal Police Power
http://www.cato.org/pubs/handbook/hb105-17.html
And the U.S. has a much higher percentage of its population in prison than China does:
http://www.nytimes.com/2008/04/23/world/americas/23iht-23pri...
According to lawinfochina.com there seem to be 307 active laws (484 if we include decisions on the relevant legal issues). No idea though if that is much compared to other countries but it does not sound that much to me.
http://www.lawinfochina.com/search/SearchLaw.aspx
EDIT: After thinking some more on it 307 sounds like incredibly few laws. About the number you would want in a lean government.