How do merchants charge for express mail?

Calculated by weight and distance. According to the information on the website, the merchant establishes a cooperation agreement with the courier company, and calculates the fees according to the weight and distance, such as the first 20 yuan/kg and the second 5 yuan/kg. Express delivery, also known as express delivery or express delivery, refers to a new mode of transportation in which logistics enterprises (including freight forwarders) deliver documents or packages entrusted by users from the sender to the recipient quickly and safely through their own independent networks or in the form of joint ventures (i.e. networking).