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，朝鮮第二艘5000噸“崔賢”級驅逐艦下水失敗，艦尾滑板提前脫離，艦首傾斜約45度卡在船臺上，導致右舷刮削、艦體扭曲變形、海水從艦尾灌入，艦內設備損壞程度未知。出席下水典禮的金正恩當場大發雷霆，指示嚴查事故責任人。22日至25日，清津造船廠廠長洪吉浩、總工程師姜正哲、船體總裝車間主任韓京學、行政副廠長金勇鶴、中央軍需工業部副部長李亨先先后被拘留。