1. First open the backend of the WeChat public account. There is an option for material management on the lower left. Click to open and jump to the interface for publishing articles.

2. Click directly on the add music option on the right interface.

3. After clicking Add Music in the previous step, this small window will pop up. Enter the name of the singer or the name of the song, but the prerequisite is that it is available in QQ Music.

4. If the background music you want to add cannot be found in QQ Music, or you already have your own audio file you want to add, you can use the audio option on the right interface.

5. First prepare an audio file, the format requirements are: support mp3, wma, wav, amr, the file size does not exceed 30M, and the voice duration does not exceed 30 minutes.

6. Click on the audio option and this small window will pop up. Then continue to click on New Voice in the upper right corner to jump to this interface. For format requirements, naming, etc., then click on upload below.

7. The last step is to use the article. For example, open this article, click the audio option on the right again, and you will see the previously uploaded audio. Click to confirm the use, and you will see the audio file appear in Coming up in the article.