Chinese President Xi Jinping is on a grand tour of the western end of the “New Silk Road,” in visits to Serbia and Poland this week before he returns to Beijing via Uzbekistan, a more eastern outpost on China’s expanding 21st Century trade route. Xi was present in Belgrade and Warsaw at the signing of a series of agreements in areas ranging from trade, education, finance, technology, and civil aviation as China looks to bolster its presence in central and eastern Europe.