[2] They also had a combustion chamber firebox, a Schmidt type E superheater, a feedwater heater and an automatic stoker.

[1] Initially used for pulling trains such as the "Hato" express between Dalian and Xinjing, they were later used to haul long-distance passenger trains between Xinjing and Andong on the Andong Line after its track was doubled.

One unit was built for the Manchukuo National Railway for use with Emperor Puyi's train.

The first six were built for Mantetsu by Hitachi in Japan in 1937, which were followed by another ten of an improved design from the Shahekou Works in 1940.

[1] At the end of the Second Sino-Japanese War, the sixteen Mantetsu locomotives were assigned to the Dalian depot, while the Manchukuo National's single engine was assigned to the Fengtian Railway Bureau; all seventeen were passed on to the Republic of China Railway.