How to deal with the owner's complaint about the multi-purpose building in the basement of the property?

Apologize to the owner and restore the original state.

The basement belongs to public property, and the property should apologize to the owner and restore it to its original state within a time limit.

If the property needs to occupy public land, it shall obtain the consent of the owners' committee and the property management enterprise. Supporting facilities that have been registered as common to all owners in the building division or unregistered but built or buried to ensure the exercise of the owner's differentiated ownership shall be owned by all owners. With the permission of the owners and the consent of the owners' meeting, the property can occupy public land.