What is temporary protection of city appearance?

Usually, security companies will urgently recruit security guards when the project is understaffed. Temporary insurance doesn't need too many rules. Temporary insurance is paid on a daily basis, that is, on the same day. Temporary insurance does not need to sign a contract. Can't come and go freely, not restricted by the contract. Second, compared with contract security, the salary of temporary security is higher than that of contract security.