China's dilemma over North Korea on show at border

By Philip WenDANDONG, China (Reuters) - It is at China's main border post with North Korea where Beijing's fraught dilemma over how to keep its unpredictable neighbor in check is best encapsulated.The diplomatically isolated North is almost entirely dependent on trade with China to prop up its impoverished economy, and about three quarters of that trade flows across the winding Yalu River to Dandong, a sleepy port city in China's north-eastern Liaoning province.