What is the function of the micro-mail recall message? How does a micro-letter recall a message?

How do I get the message back from the micro-letter? Method detailed

If we send a voice now to recall, we just have to press a dialog box that pops up and there's a recall button here, and then "the other side recalls a message."

Micro-letter Recall message time limit

Know that the micro-letter can be withdrawn, it is not very magical, but also not when can be undone, only in 2 minutes of the message can be revoked.

The message is withdrawn, can you see it?

The other side can not see, but the other side will receive a message from the system, "the other party withdrew a message."