China’s flagship airline resumed direct flight services to Pyongyang on Monday, a symbolic and logistical development that marks warming bilateral ties and comes just weeks after passenger train services were restored for the first time in six years.The Air China flight arrived at Pyongyang Sunan International Airport on Monday morning, where the Chinese ambassador to North Korea, Wang Yajun, and other embassy diplomats welcomed passengers at the airport, according to Xinhua.The Boeing 737...