Although its route can't be located on a map, Train 57021/2 transports daily necessities to over 1,000 railway employees on a weekly basis. The railway, linking the cities of Linhe with Ceke, both in Inner Mongolia Autonomous Region, stops at more than 30 stations. The rail spans over 400 kilometers, 80 percent of which is desert.
Every Monday, tugging water-tank lorries, trucks and accommodation carriages, the train traverses this "no man's land" to bring drinking water and vegetables to railway employees stationed at these remote outposts. It takes the train 70 hours to make one round trip.