I've  heard  a few veiled warnings in  past years from China , requesting North Korea simmer down on  their missile tests and threats towards neighbors .  
  This  latest warning from China looks like they are  serious about turning off the heat .
  China is one test  Kim Jong Un doesn't want to try .  
   
  If Kim Jong Un does not  heed the latest " red line "  warning from China ,  he could find  the top of his neck  will  quickly become a bloody mess .

http://www.todayonline.com/world/asia/no-war-allowed-korean-peninsular-china-warns

 

"BEIJING – China declared a “red line” on North Korea today (March 8), saying that China will not permit chaos or war on the Korean peninsula, and that peace can only come through denuclearization.

China is North Korea’s most important diplomatic and economic supporter, though Beijing’s patience with Pyongyang has been severely tested following three nuclear tests and numerous bouts of saber rattling, including missile launches.

“The Korean peninsula is right on China’s doorstep. We have a red line, that is, we will not allow war or instability on the Korean peninsula,” Chinese Foreign Minister Wang Yi told reporters on the sidelines of China’s annual largely rubber-stamp parliament.

Mr Wang called upon all parties to “exercise restraint”, adding that “genuine and lasting peace” on the peninsula was only possible with denuclearization.

Mr Wang reiterated China’s calls for a resumption of the talks between North Korea, South Korea, the United States, Japan, Russia and host China.

“Confrontation can only bring tension, and war can only cause disaster,” Mr Wang said. “Some dialogue is better than none, and better early than later.”