According to the General Principles of the Civil Law, if a building or other facilities and the shelving or hanging objects on the building collapse or fall off or cause damage to others, its owner or manager shall bear civil liability, except those who can prove that they are not at fault.
The detached exterior wall belongs to all owners, who have the obligation to maintain the building. However, if the maintenance fund is paid, generally speaking, the maintenance of wall demolition should be borne by the property of the building.