What conditions do bank depositaries (who have guns) require? What should I do if the guns in their hands are fired randomly?

All guns are registered. Do you think you can shoot them casually with a gun?

Too naive.

These depositors are not from the bank. Commercial banks are not allowed to have their own escort teams, which can easily lead to theft.

These are all managed by security companies. If you want to get in, you have to pass the review, you have to have no criminal record or bad record, and your physical condition and various qualities are up to standard.