The 1688 product detail page can estimate the shipping cost within China by entering the number of items and the shipping destination, but this is the initial setting, and due to the variability of each order, the actual shipping cost can not be completely correct trial calculation. 

A. Usually it is due to the increase in the number of items and weight, so the shipping cost increases. 

B. Attention! It may happen that the goods were originally light in weight and small in size, but due to the large number of goods, it was judged as a large weight parcel. At this time, please pay attention to whether the shipping cost is reasonable, if you think the shipping cost is too expensive, please contact the supplier to modify the shipping cost.