How can I complain about opening an apartment without the approval of the fire building?

Contact relevant departments and report anonymously.

1. Report complaints to local urban planning, housing or construction departments. You can contact these departments by telephone, e-mail or written letter, explain the contents of the complaint and attach the collected evidence.

2. If you are worried about retaliation or don't want to reveal your identity, you can consider reporting anonymously. Some cities and regions have anonymous reporting channels, through which you can provide complaint information to relevant departments.