On 1 May 2012, new "Measures for Compulsory Licensing of Patent Implementation" entered into force in China. This document replaces two earlier regulations (from 2003 and 2005) and brings the current measures into line with the revised Chinese patent law, which has been in force since October 2009.
Background information can be found on the English "IPR in China" website. The official Chinese version of the measures can be found on SIPO's website. The corresponding chapter VI of the Chinese patent law deals with the subject of compulsory licenses.