China Railways JS

The JS, whose Chinese name means Construction, was a 2-8-2 Mikado steam locomotive built in China for mainline freight, passenger and heavy shunting work. Developed at the Dalian Locomotive Works in 1957 as an evolution of the JF1, it borrowed an all-welded Soviet-style boiler, Trofimov valves and a feedwater heater from the QJ 2-10-2. The first prototype appeared in July 1957 and series production began that September. Qishuyan and the Beijing 7th Feb works together built 278 between 1958 and 1961, Datong built more from 1963, and a revised B specification followed in 1986. Total production reached 1,916 locomotives. Mainline service ended in December 2005, and the last working JS at the Sandaoling coal mine retired on 15 January 2024, ending regular steam operation in China.