SF is the most expensive. In addition to SF Express, you can negotiate the price with the courier. If the quantity is large, the price can be reduced a lot. Shentong in Tong Yuan is cheaper. The freight to different places is different, and Shentong has the widest network in China. "Shanghai belongs to Jiangsu, Zhejiang and Shanghai. I heard that the postage is cheap? " The courier fee depends on the economic level of the sending place and the delivery distance to measure the freight. Chongqing Shentong website specific freight and its customer service contact information /list.asp? Name = Chongqing Company (please click to get the phone number)