Exactly. I agree. We both agree that as far as China is concerned, the Kim Dynasty hereditary system of governance in North Korea is replaceable. However, if forced to choose between a pro-US/SK faction ruling NK or pro-China faction ruling NK, China will easily choose the latter, regardless of whether to give Kim dynasty exile or not. To China, if Kim dynasty loses the mandate, it has lost it's purpose and must be replaced by someone INSIDE NK, not anyone from south of DMZ.
You are absolutely correct. Offering exile and pardon doesn't serve much purpose because if it gets to that point, then KJU would be on the brink of losing most if not all of his power. China would probably rather directly negotiate with the most powerful (pro-China) faction directly, bypass Kim dynasty, and let the Kim dynasty be scapegoat by NK rivals, and pre-empt US-SK unification by sponsoring a pro-Beijing puppet state or pro-China leader in rival faction. KJU would lose it's value at the point which he needs exile, and it's better to let he be punished by NK rivals than offer pardon/exile. But to your bigger point, he sure as hell won't run to US-SK for protection.
Precisely, I agree 100%.
I wouldn't place so much emphasis on China's insistence on non-proliferation and denuclearization. It is the official policy of PRC for the "denuclearization of Korean peninsula" and "denuclearization of the world" eventually... but as Deng Xiaoping says "[China does] not advocate nuclear proliferation at all, but we even more strongly oppose nuclear monopolies."
So to summarize everything in a succint statement:
China's official stance on denuclearization allows it strategic flexibility - when NK state is unified + strong, it's nukes are aimed at US+allies, China can pay token lipservice to denuclearization because it strategically pins an adversary while China focuses elsewhere. On the Contrary..... When NK state is weak or collapsed, it's nukes are in uncertain hands during collapse (rogue general, sold to terrorists, lost in chaos), China can actually use it's official policy of denuclearization in real world by intervening to secure "rogue nukes", (but the True main focus is to set up refugee camps inside NK and provide humanitarian aid, pre-empt US-SK land invasion, and prop up a pro-China faction among NK elites) while the official reason for intervention is "denuclearization and securing rogue nukes". It's brilliant, even if US/SK sees through China's plan, China isn't being a liar or inconsistent with previous official policy proclaimations.
What do you think?