(L-R) Yun Kun-young, a South Korean Blue House official, Chun Hae-sung, vice unification minister of South Korea, Chung Eui-yong, top national security adviser of the Blue House of South Korea, Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), Suh Hoon, chief of the National Intelligence Service (NIS) of South Korea, NIS deputy chief Kim Sang-gyun and Kim Yong Chol, vice chairman of the Workers' Party of Korea (WPK) Central Committee and director of the United Front Department of the DPRK, pose for a photo 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)