The duty of prequel is

Handling ticketing, collecting and replacing ballot boxes, station work, supervision and inspection and maintenance. According to Sohu. com。

1. Handling ticketing: responsible for selling tickets at the ticket office, checking tickets, handling bad tickets, making up tickets, and handling passenger inquiries.

2. Ticket collection and box exchange: responsible for ticket collection and box exchange for ticket vending machines and ticket collection and box exchange for outbound ticket vending machines.

3. Station service: responsible for the station service of the station hall and platform, and actively provide services for passengers in need.

4. Monitoring: monitoring passenger flow and checking entrances, exits, stations and platforms.

5. Inspection and maintenance: responsible for inspection and maintenance of ticketing equipment and monitoring equipment.