What you want to ask is why the WeChat signature shows system update? Because the WeChat client has been updated, or the mobile phone system has been updated.

1. Open the WeChat client and enter the personal information page.

2. Click WeChat signature to enter the editing page.

3. Re-edit the WeChat signature to ensure that the signature content complies with WeChat regulations and requirements.

4. Click Save to complete the WeChat signature settings.