The difference between SF post and SF city

1. SF mail can be sent to the whole country, and the time limit for sending it to the same city: if it is sent before 12: am, it can arrive on the same day, send it in the afternoon and deliver it the next morning.

2. SF can only send the same city bill, and the delivery time of the urgent delivery in the same city is relatively fast, so the general sender can send it in the morning and the recipient can receive it in the afternoon.