China is now showing its hand:-

http://news.sky.com/story/n-korea-threats-will-be-met-by-massive-military-response-us-warns-11019780

It's making it quite clear it has no meaningful intentions of halting the machinations of NK, they're all talk and no action. All it's doing is giving NK more and more time to build up its weapons programme.

It's time for the mealy-mouthed talking to stop and visible action of some sort or there will be some military action instead.

What China will do then, we don't know except to speculate that it would assist NK as before.