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It is very necessary to install door and window anti-fall chains in high-rise residences for the following reasons:

- Fall prevention: If high-rise doors and windows fall off due to aging hardware, wind impact, accidental collision, etc., the consequences will be extremely serious. Anti-fall chains can play a temporary pulling role when doors and windows are loose to prevent direct falling.

- Personal safety protection: For high-rise residents (especially families with children and pets), if doors and windows are accidentally opened, it may cause children or pets to fall from the building. Anti-fall chains can avoid such risks. At the same time, they can also prevent external personnel from breaking in through doors and windows to a certain extent.

- Wind resistance demand: The wind force in high-rise buildings is relatively large, and doors and windows are easily shaken violently by the wind, which may cause frame deformation and hardware damage. Anti-fall chains can reduce the shaking amplitude of doors and windows and protect the door and window structure.

- Emergency protection: When the door and window locks fail and cannot be closed, anti-fall chains can temporarily restrict the opening of doors and windows to avoid wind and rain intrusion or safety hazards, and buy time for maintenance.