Why doesn't Xiaomi system display SMS preview? No popup window in SMS settings has been selected, but SMS preview is still displayed in the status bar.

The setting steps for Xiaomi system not to display SMS preview content are as follows:

1. After unlocking Xiaomi mobile phone, find the "Settings" button of Xiaomi mobile phone.

2. On the opened Xiaomi mobile phone settings page, find and click the menu item "Lock screen, password, fingerprint".

3. Then click the menu item "Advanced Settings for Screen Lock" on the screen lock, password and fingerprint details page.

4. Then click the setting item of "When locking the screen" on the advanced settings page to open the screen locking.

5. Then select the setting item "Show notification but hide content" in the setting menu when the screen is locked.

6. After this setting is completed, a notice will be displayed when the screen is locked in the future, but the content of the notice will be hidden.