How to start the youth mode: open the phone and click QQ program. Enter the QQ chat page and click on the avatar in the upper left corner; Pop up the QQ operation menu page, and click Settings; Enter QQ settings and click the General Function button; Enter the general function, click the youth mode in the mode switching, and the youth mode switching dialog box pops up. Click the switch, and the mode switching is completed. QQ starts the youth mode and ends.