Go to About Little Red Book through Settings, click Check for Update and then click Update Now to upgrade to the latest version. Let me share the update method below.

Software version: 7.92.0. Mobile phone model: vivo Y31s.

The specific steps are as follows:

1. Open the little red book on your mobile phone and click Me in the lower right corner.

2. Then click the Settings icon.

3. Then click the little red book below.

4. Then click Check for updates for the first time.

5. Then click "Upgrade Now" to upgrade the version.

6. Just wait for the download and click Install.