1 million tons of coal, from Datong, Shanxi, to Qinhuangdao, Hebei (with what mode of transportation)

Railway (because 1 million tons of coal shipments can not use the aircraft (aircraft capacity is small) and the north has no waterways, had to use the railroad) suggests that the road and rail (if the aircraft, the cost is large, but also small capacity, although fast, but the shelf life of dried seaweed long, with the train is also okay) if not, please ask again.