 His father Kung Wei-yi predeceased his grandfather.His mother was Kung Wei-yi's wife Yu Yuejie (于曰洁).Kung Tsui-chang and his wife, Wu Shuoyin (吳碩因) have a son Kung Yu-jen (孔佑仁), born 1 January 2006 in Taipei, and a daughter, Kung Yu-xin (孔佑心).