On May 21, North Korea’s second 5,000-ton Choe Hyon-class destroyer failed to launch. The stern slipway detached prematurely, leaving the bow stuck on the slipway at a roughly 45-degree angle. This caused scraping along the starboard side, distortion and deformation of the hull, and seawater flooding in from the stern. The extent of damage to onboard equipment remains unknown. Kim Jong Un, who attended the launch ceremony, flew into a rage on the spot and ordered a thorough investigation to identify those responsible. Between May 22 and 25, Hong Gi-ho, director of the Chongjin Shipyard; Kang Jeong-chol, chief engineer; Han Kyung-hak, head of the hull assembly workshop; Kim Yong-hak, deputy director of administration; and Ri Hyong-seon, deputy minister of the Central Military Industry Department, were all detained in succession.
5月21日，朝鲜第二艘5000吨“崔贤”级驱逐舰下水失败，舰尾滑板提前脱离，舰首倾斜约45度卡在船台上，导致右舷刮削、舰体扭曲变形、海水从舰尾灌入，舰内设备损坏程度未知。出席下水典礼的金正恩当场大发雷霆，指示严查事故责任人。22日至25日，清津造船厂厂长洪吉浩、总工程师姜正哲、船体总装车间主任韩京学、行政副厂长金勇鹤、中央军需工业部副部长李亨先先后被拘留。