SF Express showed delivery, and after a few seconds, the address was not detailed, and the delivery was unsuccessful-what was the situation?

Dispatching is an operation of the courier before delivery. As long as they have this piece in their warehouse, the courier will go through this procedure, and the address shown behind is unknown. Express delivery is unsuccessful because the address on your face sheet is not detailed, or for other reasons. When this piece cannot be delivered to you normally, the courier will report the problem piece to PDA for tracking at any time.