The snow-capped Tianshan Mountains loom in the background as JS Class locomotive 8358, top and tail with 8366, heads an empty coal train to the Er Jing colliery across the spartan landscape on the fringes of the Gobi Desert. The mountains are an extensive range and the highest peak is Jengish Chokusu, at 24,406 ft. Sandaoling, Xinjiang Province, China.