After the house was delivered, people moved in. Is there the owner's key in the property?

After moving in, the property management company (on behalf of the developer) will give the key to the owner.

If the house has quality problems, the developer needs to arrange the construction unit for maintenance, and the owner doesn't want to open the door to receive the maintenance personnel himself. He can negotiate with the property company and open the door for you to facilitate maintenance.

Without special circumstances, the property management company will not leave the owner's key. At present, the doors are basically AB buttons. When the renovation is completed, you will officially move in. As soon as the A key is activated, the B key will be invalid immediately. If you are not at ease, just replace the lock cylinder yourself.