Well good for them. I wonder how many people it will feed?

Estimated at less than 1 kiloton, this was a firecracker compared to the bomb dropped on Hiroshima 61 years ago, which was around 13 kilotons.

This irrational act seems to have finally gotten China's attention as noted in an excellent article by James Lewis at The American Thinker

His conclusion is right on the money:

So China’s sudden understanding that NoKo nukes next door are a mortal danger means a step in the right direction. If the Russians and Europeans get it as well, a common front against Kim and Ahmadinejad may become possible.