1. Click on the application market, open the mobile phone, and click on the "application market" software that comes with the mobile phone.

2. Click Install to open the application market, enter "Little Red Book" in the search box, and click the "Install" button behind Little Red Book in the drop-down box.

3. The little red book is installed. After clicking Install, the little red book will be downloaded, and the "Open" button indicates that the little red book has been installed.

The above is the installation method of Android machine. iPhone can be downloaded from app store, and the steps are the same as above.