On February 23, a peak return day during the Spring Festival rush, the Gehu section of the Shanghai-Wuhan Expressway saw heavy traffic flow. The No.2 Expressway Brigade of the Changzhou Municipal Public Security Bureau Traffic Police Detachment took multiple measures to ensure road safety and smooth traffic. They joined hands with the Expressway Administration to deploy drones for patrol. The drones monitored real-time traffic and guided vehicles with loudspeakers.（Photo by Xia Chenxi）