If the railings in the community are aging and almost hit people, which department should I look for?

The security risks of the residential guardrail are the responsibility of the residential property. You can call the property.

For residential areas where houses are still under warranty, developers should be responsible for maintaining and solving problems. But among them, the property also needs to help the owners communicate and coordinate, truthfully reflect the problems encountered by the owners to the developers, and inform the owners of the developers' answers.