How to turn on the youth mode of mobile phone?

Take Huawei as an example. The function name of starting the youth mode in the mobile phone is "Use the mobile phone healthily". The starting method is as follows:

Tool: Huawei P20

Operating system: EMUI 10.0.

1. After opening the Huawei mobile phone and entering the system, select the setting icon of the mobile phone to enter, as shown in the following figure:

2. Enter the setting interface, and click the option of healthy use of mobile phone, as shown in the following figure:

3. After entering, select the following options to turn on the healthy use of the mobile phone, as shown in the following figure: