1. Open WeChat, click the "Discover" interface and select the "Friends Circle" function at the top (as shown below):
2. Find the background of WeChat circle of friends above, and click the background position in the figure (as shown below):
3. Click the "change cover" function in the lower right corner (as shown below):
4. There are three ways to change the cover (background), choose from the mobile phone photo album (as shown in the figure below):
5. Select a picture (as shown below):
6. Adjust the image position, and then click Finish in the lower right corner to set it successfully (as shown below):