Yep,

The green books are being phased out province by province in China. ( they're getting sick of people losing them! ) Now a residence permit will be stamped right into your passport just like your initial entry visa. It depends where you are though.
It is a new thing, and even in provinces where they are starting to do this, if you have a green book residence permit it is still valid - it will be changed when it is time to renew it.