North Korean leader Kim Jong-un visited the Chinese border city of Dandong on Saturday, according to state news agency Xinhua. The trip, Kim’s first visit to China in more than a year, comes ahead of next month’s Asia-Pacific Economic Cooperation summit in the southern Chinese city of Shenzhen, where Donald Trump and other world leaders are expected to visit. He was accompanied by Wang Huning, China’s fourth ranked official, according to Xinhua. Wang called on the two countries to expand...