The JF6 was a light 2-8-2 with a similar ALCo ancestry to the heavier JF Class. Several hundred were built for Japanese controlled railways in China prior to Liberation with a handful more constructed in China between 1958 and 1960. In the mid 1980s there were still a lot of JF6 on the national system but they probably extinct by the end of the decade. Some survived in industrial service until the late 1980s.
JF.3413 was works pilot at Nankou Works, near Beijing, on 4 January 1985. The factory constructed steam locomotive parts such as coupling rods and air pumps.