About time China stepped up and leashed North Korea in.China and the US have vowed to work together to persuade North Korea to give up its nuclear programme and to settle tensions through dialogue.
A Chinese statement issued during a visit by US Secretary of State John Kerry said the nuclear issue was the "shared responsibility of all parties". Link.
The boy needs to learn that there are better ways to boost popularity - threatening nuclear strikes is not one of themThe North says it has also been angered by joint US-South Korean military exercises.
Though its rhetoric has been more bellicose than usual, analysts say it fits a long-standing pattern, and may be intended to boost the popularity of Kim Jong-un, who came to power last year.