If you buy it yourself, can the access control of the property right unit be universal?

The access control for buying your own property is definitely not universal. However, if it is a similar card, it is feasible in theory and requires the authorization of the manager, that is, the property.

If it is a direct user, you can consult the residential property department or security. Only they know whether it is universal or not. If you are an engineer, you need to pay attention to what kind of card reader is connected to the access controller. If it is the same kind of card, it is feasible in theory and needs the authorization of the administrator.

Nowadays, universal access cards are widely used. The more access cards, the more inconvenient it is to carry. However, the unit building and the community gate are shared, which has security problems and is equivalent to all cards. You can consider opening the door with a mobile phone to give different people different access rights. Residents in the community have their own unit building and community gate rights, and staff in the community have community gate rights, so the security is improved compared with a card.