Table 1: The previous data of the collecting, distributing, and transporting system.

YearCollecting systemTransporting system Distributing system
Market share of Daqin Railway’s coal transportation (%) Loading spots 10,000-ton loading spots 20,000-ton loading spots 10,000-ton freight train per day 20,000-ton freight train per day Train density Daily average volume (million ton) Max. daily volume (million ton) Unloading spots Use ratio of port (%) Use ratio of unloading station (%)

200692.1091341169.46.47269.579.1378.7048.87
200790.20116421160.122.483.283.2399.87482.2349.68
200890.10118421255.629.885.893.2105494.0760.35
200990.20129431440.936.59090.5111.35583.4348.81
201090.67147441634.848.788.3110.97122.03597.9670.21
201190.98147441635.559.697120.6129.95114.4982.48