Is China's Xi worried that North Korea wants "to confront the U.S."?

Hong Kong — Chinese President Xi Jinping wrapped up a two-day visit to North Korea on Tuesday by vowing to deepen ties and expand cooperation with Kim Jong Un. Xi called the summit a "new historical starting point." Beyond the optics and the carefully choreographed messaging from the Chinese and North Korean governments, experts say the real motivation for Xi's visit was to keep tabs on an emboldened Kim — his nuclear armed neighbor. …