What's the difference between the security guards recruited by the university security office and those recruited by security companies, but going to the university to stand guard?

No, the security department is an internal post of the school, and it has the opportunity to be compiled. Now many universities outsource some security work to property companies, which employ security guards to stand guard. As far as treatment is concerned, the salary of the security office is higher than that of ordinary property companies in the same school and the same nature of security posts.