Ask who took the mailbox key downstairs in the community.

You can take it from the residential property.

The mailbox belongs to the supporting service facilities of the community. The property holds a master key and can also authorize the postman to carry out maintenance and other related services.

In addition, if the property does not have a spare key, you can also directly find the unlocking company to unlock it, but you need to consult the property company in advance, and they will arrange relevant staff to handle it.