The South Manchuria Railway (Japanese: 南満州鉄道, romanized: Minamimanshū Tetsudō; simplified Chinese: 南满洲铁道; traditional Chinese: 南滿洲鐵道; pinyin: Nánmǎnzhōu Tiědào), officially The South Manchuria Railway Company, Ltd. (南満州鉄道株式会社, kyujitai: 南滿洲鐵道株式會社, Minamimanshū Tetsudō Kabushikigaisha), Mantetsu (Japanese: 満鉄, romanized: Mantetsu) or Mantie (simplified Chinese: 满铁; traditional Chinese: 滿鐵; pinyin: Mǎntiě) for short, was a large National Policy Company [ja] of the Empire of Japan whose primary function was the operation of railways on the Dalian–Fengtian (Mukden)–Changchun (called Xinjing from 1931 to 1945) corridor in northeastern China, as well as on several branch lines.