Would really like folks who down-voted you to explain themselves. The fact China (and Russia) are the only supports of North Korea says everything you need to know about the essence of the rulers of both countries.
Well, someone needs to be friends with NK. I don't think China leaning on NK could really help there. NK would just get more isolated. The solution to North Korea is to stop scaring them so that they will come out of their shell a bit.
That's not quite true. North Korea is also getting resources and labour from Burma, Iran and Zimbabwe. That is not counting countries that are doing business with North Korea through intermediaries in China or Russia.
As far as I heard, some european studios have their cartoons drawn in North Korea (you can buy a lot of quality and really really cheap work there). Does that count as support? If it doesn't, what does?