Open the WeChat application and enter the WeChat activity page.
Usually, there is a "…" or the "Settings" button in the upper right corner of the WeChat activity page. Click it.
In the settings menu, look for the option "Cover Page" or "Cover Page".
After clicking "Cover Picture", you can select a picture, such as selecting from an album or taking a new photo.
Select the photo you want to set as the cover picture.
Adjust the position and size of the photo to fit the display area of the cover.
Confirm and save your cover map settings.