Why can Huawei p9 make a phone call after the Do Not Disturb setting?

The caller may be the designated contact. When Do Not Disturb is turned on, the phone will ring or vibrate only when it receives a call or text message from the designated contact, and other people will not be disturbed when they call. Cancellation method:

1. Open Settings, click Do Not Disturb and turn on the switch.

2. click "allow disturbed content > white list of incoming calls/short messages".

3. Check the practitioners who are allowed to call, press and hold the practitioners, and then click the trash can icon below to delete.