What does Tangshan public security checkpoint check?

Public security checkpoints refer to police officers relying on specially set checkpoints, using police technology and law enforcement skills to identify vehicles that may endanger the public security order of a place or the safety of major activities in traffic and people flow, and order them to drive into or enter the checkpoints for security inspection, so as to confirm or exclude the public security control activities of criminal suspects. Public security checkpoints are mainly used for safety inspection of vehicles at important checkpoints, transportation hubs, borders, ports and other places, and X-ray scanning inspection of passing freight vehicles to see if there are prohibited items such as guns and ammunition, controlled knives, inflammable and explosive articles, dangerous chemicals and drugs. So as to ensure the safety of passing vehicles.