Xi Jinping Pong read His Rotundity the riot act, that's all.
There's a contingent of fellow travelers in South Korea who want peace at any price, just as there are in the West. Xi instructed Kim to play them for the fools that they are, just as Xi is playing Trump and the US.
Do you hear the sound of that fiddle?
The communists of China and North Korea are in it for the long haul, a long, slow game toward victory in their shared mutual fight to achieve socialist ideals.
Just as Xi Jinping lied about not militarizing the reefs China has illegally occupied, they're lying about this too.
The real objective is to get the US out of South Korea, and ultimately out of the region, and Kim is the instrument for accomplishing part of this broader aim.