What is the most difficult task for security guards?

I think the security guard is very tired. Because I'm also a security guard. Let me talk about my heart. I work the day shift and the night shift, which is very time-consuming. Secondly, record every car during the day and control the car pole to let the car pass. Secondly, patrol and stand guard every day. On the whole, I am very tired. Might as well do a little business for others.