How do I know that the other party blocked the QQ address book message?

Open and log in two QQ numbers and add them as friends. Then use one QQ number to block the message of the other QQ number.

Then we use the computer to send another QQ message to the QQ that has just actively blocked another QQ message. Such as "grasshopper black".

Then log in to QQ. Pay attention to this operation. You should send a message on the computer first, and then log in to the blocked QQ on your mobile phone.

Check whether the QQ message I just actively blocked is synchronized to the mobile phone, and find it is out of synchronization, because the other party blocked the message, so it is out of synchronization. Note: Quit mobile QQ.

Then we go back to the computer and remove the shield.

Now, send another message and see if the other party can receive it.

Then go to the mobile phone, or log in to another QQ number again, and find the message displayed to the other party (QQ that actively blocks information) at this time.

Through the above steps, we can see whether the message is blocked by the other party.