It's often hard to entertain yourself while hanging around in a police station. So why not see what plausible explanations you can come up with (using your no doubt extensive knowledge of Classical Chinese) for the four idioms,four character phrases, or whatever you want to interpret them as, we can invent here:
Allow me to start:
1) Used to describe an efficient organization, where both people (人) and machinery and equipment (物） does (办) exactly as they say (说)
Or perhaps you can think of something better.