Tools: Huawei p40, HarmonyOS 2.0.0, WeChat 8.0. 16.
1. Open the WeChat app and click "Video Number" on the "Discovery" page at the bottom.
2. Enter the video number page and click the villain icon in the upper right corner.
3. Click the Privacy option.
4. Click "Don't let him/her see mine" to go to the next page.
5. Finally, click the icon in the upper right corner to set it.