TAIYUAN, July 8 (Xinhua) -- In a pristine control room, six high-definition screens display real-time images of coal-mining operations, with a huge excavator machine crunching its way through a coal seam and loading it onto a truck.
Measuring 20 meters high, the excavator is controlled by "driver" Wang Yongsheng, who sits in a remote cab several kilometers from the coal face, in the city of Holingol, north China
