Xiaomi NFC supports encrypted access control, how to open a blank card?

After the virtual door card is successfully added, double-click the power button/negative screen to call the successfully opened virtual door card offline (residential property, school or other offline scenes), so that the property can open permissions for the card.

* The success of opening permissions depends on the property.

After the permissions of the virtual door card are successfully opened, you can swipe your phone to open the door.