The car was received in September, 1984, and served in Sujiatun locomotive depot before.
The Qianjin steam locomotive was designed and manufactured by Dalian Locomotive & Rolling Stock Works in 1956 with reference to the anti-imperialist steam locomotive of the former Soviet Union. 196 1 year, 42 sets have been produced in six factories including Datong.
From 1963 to 1964, Datong Locomotive Works redesigned the boiler part of the car and carried out a series of reforms. On the basis of the original four moving wheels, a moving wheel is added, which increases the traction. All the technical indexes of this locomotive have been improved, and the thermal efficiency and traction performance have been improved, and it once became the main freight locomotive of the trunk line. This model has produced 3000 sets, most of which have been scrapped.
A series of new technologies, new structures and new materials, such as all-electric welding boiler, cast steel cylinder, closed cab, mixed water preheating device, coal feeder, blower and air vibrating screen, have been adopted on the locomotive. Thus, this type of locomotive has reached the advanced level of steam locomotives in the world. It has the characteristics of high wheel power, good traction performance, coal and water saving, and good working conditions for drivers and passengers.
After Dalian Locomotive Works manufactured five cars, Jiaotong University put them into mass production with the Locomotive Works. As for the name, the original name was "Peace", but it was changed to "Anti-imperialism" during the Cultural Revolution, and changed to "Progress" in 197 1 year. The locomotive 1988 7207 was officially discontinued after leaving the factory, with a total of 4,708 vehicles manufactured.