On the limits of adhesion

The morning empties head towards Shenbutong and the Kuangsan copper mine on the Baiyin Mining Railway. The heavy train on icy and snowy rails was working at the very limits of adhesion and the train finally slipped to a halt a bit further up the line. I had intended to make the shot from higher up the hill, but the train followed so soon after the passenger service that I had only scrambled part way up the slope. As it happened the resulting angle wasn't too bad.