SF: The best direct selling company with slightly higher price and the fastest speed. Generally, air transport can reach major first-and second-tier cities in China, but each city has a distribution scope, and the service fee needs to be increased beyond the scope.
Shentong: Joining the company, the network is complete, but the delivery network is slightly inferior to SF, which cannot be reached by cities below the county level; The price is acceptable, the speed is slow, the service is poor and the efficiency is low. Not recommended for users.
Huitong: Imitating Shentong mode, the price is lower, but the speed and service are not ideal, the network is not perfect and the speed is slow.
Dayun: The network is average, the price is low and the speed is slow.
There is not much difference between Tong Yuan, Zhongtong and Dayun.