A South Korean solider stands on guard in a conference room at the border village of Panmunjom in the demilitarized zone (DMZ) on April 18, 2018. The summit between South Korean President Moon Jae-in and Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), is scheduled for April 27 at Peace House in the southern part of Panmunjom. (Xinhua/Wang Jingqiang)