Baiyin Mineral Railway SY 1470 steams uphill through the scenic Loess canyons that characterize this part of China. This train, bound for the Shenbutong Quarry, is the last revenue (non-tourist) standard gauge steam passenger train in the world. In fact, despite the fantastic scenery this is definitely no tourist railway, but instead the Baiyin Railway serves two smelters and a massive quarry.