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According to the query of market sales big data、 stores use optimization algorithms to predict and analyze local sales before customers submit orders、 and enter relative regional warehouses in advance to save storage、 distribution and transportation costs.

The special line generally refers to the door-to-door transportation mode of Shuangqing、 similar to express delivery.

However、 air transportation is only the transportation from one airport to another、 which requires separate application for customs declaration and clearance.

In general、 small goods are more likely to choose special lines. Preferential price for large goods transported by air.

The international express line is a dedicated logistics transportation service independently developed by domestic express and logistics companies from domestic export to the target country、 or from the target country to domestic import. International express lines have the advantages of fast time、 low price and smooth customs clearance.