How will China react to this?

http://constitution.com/japan-move-forward-preemptive-strike-kim-jong-un/

Will China ignore Japan, allow Japan to get rid of a bad Communist Regime, or chastise and be loyal to an empior (the Kim Family of North Korea) with a brainwashed population?

REMEMBER THAT THE WAR BETWEEN SOUTH AND NORTH KOREA NEVER STOPPED and only an armistice treaty exists between the two states.