The access card has no card number.

There are two possibilities that the access card number does not exist. One is that you used it wrong, because you confused multiple cards. The other is that you didn't pay the property management fee, so your card number was stopped. These possibilities exist, so take a closer look at which direction you can solve these two problems.

You can go and brush the machine. General system problems can be solved. There is something wrong with the mobile phone. You can take it to the mobile phone after-sales maintenance department for inspection.