2. After entering the QQ mailbox, click the "Settings" option next to several characters in the QQ mailbox.
3. In the pop-up interface, find "Personalized Signature" in the drop-down page and click "Add Personalized Signature".
4. In the pop-up dialog window, click the picture icon below, and click "Web Photo" in the pop-up menu.
5. Paste the link of the picture into the link window, and then click OK respectively, so that the picture can be inserted into the signature of the mailbox.