Choose the railway. Because compared with roads and waterways, although the distance and time spent by railways are a little longer, there is not much difference. And the tonnage of sea salt is large. The cost of road transportation is high. Railways can save a lot of costs. Under this premise, it is worthwhile for the railway to spend a little more time and distance.

Reasons for not choosing waterways: It's winter and the weather is unstable. It rains or blows at any time. Are all natural factors. It is unpredictable. If it happens, the consequences will be unimaginable. Moreover, what salt fears most is water, so waterway is not an option unless absolutely necessary.

The reason for not choosing air transportation, 6000 tons! The cost is huge. This is sea salt. Not gold!