Add method: Slide the screen left and right on the mobile phone, find the installed WeChat icon on the screen, click Open and log in to WeChat. Next, in the main WeChat interface that opens, click the "I" tab in the lower right corner. At this time, my page of WeChat will be opened, and click the personal avatar icon at the top here.
Next, in the personal information page that opens, we click the "More" menu item. In the more information page that opens, we click the menu item "Personalized Signature". This will open the editing page of personalized signature, where you can enter the input text, click the emoticon icon below and add your favorite emoji expression.