If you need to set the chat background of WeChat, you can follow the following methods.

Here, take the CoIorOS 12 version of OPPO FindX3Pro mobile phone as an example:

Open wechat > enter the friend chat interface > click the () icon in the upper right corner > set the current chat background > select the background picture/select/take photos from the photo album to set the chat background.

Due to different models and system versions, the operation path may be slightly different, please refer to the actual operation interface display of the mobile phone.

This answer applies to all OPPO models.