This picture shows assistant driver Ma Xinsheng checking the operation of a locomotive at the Sandaoling coal mining area in Hami, northwest China's Xinjiang Uygur Autonomous Region. /Xinhua Photo

In the 1990s, there were more than 30 steam locomotives running in Sandaoling, a key area for China’s coal supply, but the number has reduced to only 11 nowadays. /Xinhua Photo

Once responsible for carrying coal, the steam locomotives have become outdated due to advances in technology. Once they break down, they will be dismantled since no new parts can be sourced. /Xinhua Photo

The last train being dismantled will mean the end of the line for people like Ma Xinsheng, who have devoted nearly their whole lives to operating and maintaining these engines. /Xinhua Photo