How to recover after Xiaomi 3 is blacked out?

Step 1: enter the "security center";

Step 2: Click the "Harassment Interception" button;

Step 3: Click the "Settings" button in the upper right corner;

Step 4: Click "Blacklist Number";

Step 5: Click "Edit";

Step 6: Click "Delete".

After that, the black people were restored.