QJ 6878 and QJ 6638 powered train 22841, the 07:00 Haoluku - Daban freight, eastwards along the valley from Xiakengzi on 23 November 2002. QJ 6638 was a relatively early withdrawal, going less than 6 months later. QJ 6878 did much better, surviving until September 2005, by which time steam operation from Daban was much reduced and within a few months of finishing altogether.