Huawei HarmonyOS System Health Mode cannot modify the expiration time.

Does the subject want to ask, "What if the validity period of Huawei's HarmonyOS system health model cannot be modified?" ?

1, enter the settings, find the screen time management, and click the "available time" option.

2. On the "Available Time" page, set the total time allowed to use the mobile phone every day.

3. If you need to change the daily screen time management duration, you can click Add Available Duration under Available Duration to set a new duration rule.