Generally speaking, the bus, catering and accommodation for interviewers and staff are strictly separated. Get up in the morning, eat in a different place, and then take a bus to the test center. All Chinese food will be packed in the same place.
At 6 o'clock every afternoon, after the interviewer finishes his dinner, the staff will "guard" the elevators and stairs. The interviewer can only go back to his room to rest, and can't stay anywhere else. After returning to my room, there will be armed police on duty at the door.
The interview examination room and the waiting room are isolated from the outside world. Both the interview examination room and the waiting room are "forbidden areas" and the outside world cannot communicate with them. The interview examination room and the waiting room become separate "forbidden areas", and the staff work cards strictly distinguish between "red cards" and "blue cards" to avoid cross-posting. Both the accommodation building and the examination building are covered with monitoring, and the examination room, waiting room and corridor are monitored throughout.
These measures are all to ensure the fairness and justice of the examination results in the examination process.