I suspect China would have a response....unless they’ve had it with the North Koreans. With the issues over trade water routes Japan reacting might just tilt those scales. Could get real ugly...
For China, NK is like that Pomeranian that came with that girlfriend that you kept around until it peed on your carpet once too many times and you realized you were actually OK with dumping the girl to be rid of the accursed dog.
NK has been increasingly more exposed to the rest of the world and humanity is shocked and desirous to DO something for a people that shouldn't exist so enslaved in the 21st Century.
China helped Pakistan get nukes, and they run interference for North Korea.
When China helped Pakistan get nukes, we should have given Taiwan about 200 nuclear warheads and a ballistic missile sub to retaliate for Pakistan.
China sells to North Korea. I doubt they would like to lose a communist ally. China is just as totalitarian as they are-don’t doubt it. Would they sit idly by and allow their natural ally next door to be invaded by the US?? Wouldn’t count on it... We made that mistake in ‘50.