Sorry, but what is the purpose of this "massive propaganda and military machine"?
Why would he need to be dependent on those who can provide "his public perception"?
Because he's not the one who has the power. There's a whole propaganda machine who
knows that the stuff about him is not true,
because they are the ones who made it up.
There are two different sources of power for a North Korean leader. One is the obedience/worship of the North Korean people -- which depends far more on the propaganda machine than it does on the individual (Kim Jong-Il was not at all a charismatic person, and made few public appearances...the people's love of him wasn't because of anything special about him). However, those in power don't believe the propaganda -- they're the ones who help create and propagate it. So the other source of power (and the more important one) is one's political power and relationships. Dad and Granddad both had powerful political relationships that kept them in power; but son doesn't have that. He's new to the game, with only a few years to jump into the game. He's a youngster, less than 30 years old, with no previous leadership experience at all...who's dealing with people 2-3 times his age, who've spent decades in the power game. They aren't going to listen to or follow his orders. Its his aunt and uncle that they listen to (both insiders with very strong relationships and connections). He's simply a convenient tool for them to cement their power.
Getting rid of Kim Jong-Eun would be
incredibly easy for them, if they wanted to. Kill him, then use the propaganda machine to spin a suitable story. Kim Jong-Eun derives
no power from the propaganda surrounding him, since he has no control over it.
What are your qualifications?
Almost 20 years in China, including significant work with the Chinese gov't. If you want to know more, check out my brief biography
here.
But that's not even a useful statement given that nobody knows from the onset of war or revolution whether or not it is going to produce greater or lesser stability and those who are weighing the odds, as China presumably would do in such an example, would most likely think that war or revolution would result in lesser stability. Why? Because that's what war and revolutions almost invariably bring.
In other words the question of their opposition or otherwise could only sensibly be made in hindsight. The situation we are talking about, an outbreak of war between North and South Korea is one that China couldn't foresee as one that could be hoped to bring about greater stability.
Actually, if we are talking about a military coup, they'd be dealing with people who are already well-established within the N. Korean hierarchy. If enough of them wanted to launch a coup d'etat, essentially killing/imprisoning the key leaders in the current system, there could be reasonable expectation of pulling it off fairly quickly. They'd then have control of the propaganda machine and could spin whatever tale they wanted ("Kim Jong-Eun was brutally murdered by his aunt and uncle; the two of them tried to take over the government for themselves, but forces loyal to our leader defeated them. We are now taking over power until a suitable new leader can be identified").
This would be a plan which, if there were enough key people involved, could be pulled off fairly quickly, and from China's perspective would have a very high probability of resulting not only in a more stable situation, but that would leave the new gov't deeply indebted to them for their help. And if it failed...things would be no worse than they are now.