Is Yantai Railway Station a security patrol or a police patrol?

Security guards, belonging to the railway bureau, sign contracts with the municipal security company and are appointed by the security company, and the railway police are trained to take up their posts. The railway police can't be changed into the police who are officially compiled. This requires taking the police recruitment examination, also known as the civil service examination, otherwise it will not work. This is governed by the civil service law. It can be said that they are not under the control of the police and have nothing to do with the police, but they are under the jurisdiction of the railway police. Their captain is a policeman, but their contract is given by a security company.