Garden Rose -- North Korea? -- already sanctioned to the max, have been for a long time, virtually cut off from the bulk of the world economy -- and you want to talk about something China well might respond to militarily? -- not to mention that little thing that if a military action were launched against North Korea it could pretty much level Seoul in the first hours, if not minutes, even with massive opening fire against their numerous heavy artillery pieces built into bunkers dug into their mountainsides overlooking Seoul?
also, you might recheck your info re Iran being in compliance with the NPT