Face recognition information cannot be changed directly, so it needs to be deleted and re-entered. Taking Xiaomi MIX4 mobile phone as an example, it takes four steps to delete face recognition information. The specific operation is as follows:

1. Click fingerprint, face and password. In the system setting interface, click Fingerprint, Face and Password.

2. Click on the face to unlock. In the fingerprint, face and password interface, click Face to unlock.

3. Select the modified surface. In the face unlocking interface, select the face information to be modified.

4. Click Delete Polygon Data. In the Surface Data interface, click Delete Surface Data.

5. Enter face data. In the face unlocking interface, just enter face data.