[nine_k]

I suppose that strong bar on 5th floor may be a means to keep people inside, not prevent invasion from outside.

That is, it might be a safety measure preventing falling from a window. E.g. windows in my apartment used to have state-mandated bars because my daughter was small, and had to be prevented from falling from a window.

[justicezyx]

I am amused that such statement is even possible, as if, someone just lost their common sense and start to reason China in a way that is exactly opposite of what they believed to be common sense.

To be fair, I spent first 24 years of my life in China. Your idea were never appeared in any form of discussion when I was there. I did not even fancied about such explanation.

All in all, I assume you want to have a reasonable discussion.

To your point, no, those bars are not for preventing staff falling.