China stages drills after US & SK joint exercise.

https://sg.news.yahoo.com/china-stages-drills-warning-us-091301159.html

This is a crystal clear message to the US & SK that China will participate in the war if the Peninsular war breaks out especially when NK is under attack unless NK is the first to launch an attack.

Russia will also participate in the Peninsular war as it has a vested interest because it won't allow USA to take control of NK since Russia is sharing a border with NK.

Therefore, the frequent joint military exercises won't scare NK at all as NK knows that China & Russia will get involved in the war.  This war won't be as simple as the US thought.