My unit is a property management company, and the security guard is hired from outside. Security guards are uneasy about the management system at work.

First of all, you should clearly write down all violations (time, place, person, process and result), and explain your previous management requirements and traces, otherwise the boss will think that you are not acting, and then explain your handling opinions and improvement measures for security, which are well-founded and well-founded, and the boss will have a new understanding of you.