I live on 19 floor. What if the property is not allowed to install guardrails?

This problem is complicated, so it is definitely possible to install guardrails for safety. The key is to abide by the owner's regulations. If the regulations stipulate that you must not do it, you must go through certain procedures, such as asking the owners' Committee to coordinate and approve it. The property disagrees, mostly because it can't destroy the appearance of the building and can't affect the fire fighting. In fact, these can be solved through coordination, such as unifying the appearance and asking the Commissioner of the fire department or the planning bureau for guidance.