A Chinese tourist group got into a deadly accident on April 22 when their bus fell off a bridge in North Korea. Thirty-two people died and two were injured. On the morning of April 26, North Korea sent a special train to carry the bodies of the dead and to take the injured Chinese back to China. Kim Jong-un went to the train station to see the train off. He stepped on the train briefly to greet the wounded people.
Sources:
{1} China News, April 26, 2018
http://www.chinanews.com/gn/2018/04-26/8500315.shtml
{2} The China Press, April 23, 2018
http://ny.uschinapress.com/spotlight/2018/04-23/143317.html