What is the secret of healthy use of mobile phones?

Protecting passwords with your own questions is a function to improve account security. Healthy use of mobile phones is a function of Huawei's mobile phones, which allows users to really use mobile phones healthily. The secret of healthy use of mobile phones is to protect passwords with your own questions to improve account security. Healthy use of mobile phones can effectively control the screen usage time from the perspective of available time and application limit.