The circulation speed of the express company depends on the address of the express recipient (it is determined by the delivery network of the express company).

SF Express (including any express delivery company except the postal service) has almost no delivery network in towns and villages.

Then, if it is circulated within the province, the postal service promises to deliver it the next day.

The only thing is inter-provincial circulation, and the recipient’s address is in an urban area. SF Express may have an advantage in speed.

There are many kinds of postal express delivery, it depends on which kind you send. If you use postal express delivery, the speed is not slower than SF Express at all. But if you are sending other express delivery (postal economic express, postal parcel, postal mail), it is definitely incomparable with SF Express.