Express delivery, also known as courier, is a new door-to-door, hand-delivery mode of transport in which logistics companies deliver documents or parcels entrusted by users from sender to recipient quickly and safely through their own independent networks or by means of joint cooperation, for instance, networking. The course features express parcels constantly in transit, from purchase to delivery, from delivery to receipt, and finally from return to refund, showing the current express industry's characteristics of being fast, accurate, and intelligent. In the hundreds of millions of small parcels, it gives an insight into the big livelihood served by China's logistics.