Chung Eui-yong (3rd L), top national security adviser of the Blue House of South Korea, meets with Kim Jong Un (1st R), top leader of the Democratic People's Republic of Korea (DPRK), in Pyongyang, DPRK, on Sept. 5, 2018. South Korean President Moon Jae-in's special envoys met Wednesday with Kim Jong Un in their one-day visit to Pyongyang, the presidential Blue House of South Korea said. (Xinhua/South Korea Presidential Blue House)