Thanks to specilisation and economies of scale you find all kinds of clusters of IPR infringements in China; certain IPRs of certain product categories are prone to be infringed in certain provinces, regions or cities.
Chinese Law professor Blog‘s Donald C. Clark wrote about the USTR that announced in the Special 301 Report of April 28, is would conduct a special provincial review (SPR) of IPR in China. First step will be invitation to the public to comment about the locations and issues that should be the focus of the review. Deadline July 14, see specs here.