I'd say China's green card laws are actually in a state of flux, not finalized.
On June 30, 2012, China passed a new immigration (exit-entry) law covering green cards and other visa-related topics.
According to the LawAndBorder blog:
The law, at the highest level of generality, allows permanent residence to be granted to foreigners who make “outstanding contributions” to China or “otherwise meet the requirements” for permanent residence as set by agency regulations. (Article 47). The law sets no targets or quotas for the number of green cards to be granted. By the end of 2011, just 4,752 foreigners had been granted green cards nationwide.
The blog also says that the new law will go into effect in June 2013, before which we should be on the lookout for the agency regulations with more specific guidelines.http://lawandborder.com/?p=1381