Log in to the email address 163.

Click "Settings" above to select "General Settings".

Click "Signature/Electronic Business Card" on the left after entering.

You can choose "New Text Signature" or "New Business Card Signature".

Take "new business card signature" as an example, and click to enter editing.

Click on each item in the business card to enter editing input.

When selecting a signature item, "Name" in "Business Card Settings" is a required item for identification.

Click "Save" after editing, and select the default signature in "My Default Signature", which will be automatically added to the end of the email when writing.