"take care to leave no blood on the face, no wounds on the body, and no people in the vicinity." and "Do not consider whether you are a match for the subject, whether you will harm the subject, or how long it will take for the resistance to subside. You must achieve a state of unawareness and become a resolute law enforcer staunchly protecting the dignity of city administrative regulations."
Guangzhou's Southern Metropolis Daily had the story; danwei has the translation.
More details on the whistleblower who publicized the manual at the EastSouthWestNorth blog.