china korea war-capabilities spying

What better way for the Chinese to test the capabilities of US Army than to bring those forces out.
Even if hostilities are not engaged, the Chinese get to test us capabilities, expend resources us while they act innocent.
Even were hostilities to break out, none could be maintained against Chinese interference or, if you would, disapproval.  Such is the might of China's economy.
China has the ability to control both sides.  What could NKG do if their borders were closed?  Nothing.  They would be totally isolated.
Distraction from the real economic war continues to be a primary goal, but what better way than to create hostility against the United States and simultaneously observe, distract and weaken your enemy.  If things played out correctly, they might even acquire dominance over the South Korean manufacturing juggernaught.  One cannot rule out involvement of South Korea, but that would be unlikely. However the existence of pro China factions in south Korea is as certain as China involvement in the north. The failure of the us intelligence community on this issue is less surprising than its failure to see the Chinese economic war long after it was lost.
The question of the day is "where is Russian intelligence and interest"? Their proximity and less corrupted government (less but still corrupted) must have some idea what is happening and yet are surprisingly quiet.