Traffic from the Yumen oilfield to the industries of Lanzhou has long formed a major part of the traffic on the Wuewinan - Lanzhou line. In steam days that meant pairs of QJs working hard to drag heavy trains up to Wushaoling summit. QJ 1492 and QJ 2564 were photographed south of Shagoutai working a southbound oil train up the bank late on the morning of 30 December 1989.