They are allies, but the relationship between them has changed quite a bit since the Korean War. A few years back, when N Korea was launching missiles in Japan'

They are allies, but the relationship between them has changed quite a bit since the Korean War. A few years back, when N Korea was launching missiles in Japan's direction, China was actually going to impose sanctions on them if they didn't stop. They definitely don't want us in their back yard, but I don't think they are eager to rush to N. Korea's defense this time around. In the end, China only cares about what's in China's best interests. Here we are, the Unites States, buying trillions of dollars of stuff from China. Meanwhile, all they ever get from N. Korea is instability in the region and propositions for handouts.