Asked how to sign the banner?

If you want to make peace and send it formally, write: the person who was helped;

If you are not short of money, send someone who makes him sick, then write: people who are threatened by security guards, and then send them with gongs and drums.

If it is not easy for you to make money, don't pay attention to him. If he threatens you, you say you want to find the company leader. If he really did it, you should call the police directly, and ask 1 10 for the company leader to collect evidence, and things will be a big deal, and there is nothing the security guard can do.