Although many people hope that China’s economic freedoms would bring along political reform, that doesn’t mean that the government will just let things happen willy-nilly without a fight. After all, there are many varied interests across the communist spectrum nowadays that are varied. Some generational, some with personal ties to either a region or business, and many other reasons that would take another post to examine.
http://www.chinalawblog.com/2011/09/if_you_want_a_watered-down.html