What are the responsibilities of subway doorposts?

Control the flow of people entering the station and manage the opening and closing of the gate to prevent the gate from being damaged or bypassed. Some subways in the gate area are equipped with gates to control the flow of people entering the station. Station attendant is responsible for managing the opening and closing of the gate, so as to ensure that every passenger can enter the platform area only after passing the gate ticket inspection. Avoid the door from being damaged or bypassed. Subway is a kind of fast, large-capacity and electric traction rail transit built in cities.