In order to strictly control the entry into Beijing and strengthen the epidemic control, the police and staff need to check the travel cards, health treasures and personal identity cards of all people entering Beijing. If they don't have an ID card, they can use other documents instead, or just say their ID number.
When the traffic flow is heavy, in order to alleviate the traffic pressure caused by the stop of vehicles, the staff will set up a post in front of the security inspection equipment at 150 meters, check the travel cards and health treasures of people entering Beijing in advance, and issue a self-made "pass card" after passing the inspection. When the vehicle arrives at the security inspection equipment, the inspected only needs to show his ID card, which shortens the waiting time.