A cross-border truck is seen entering Shenzhen. Shenzhen has implemented closed-loop management measures at its checkpoints for cross-border shipping with Hong Kong to better protect the transportation of food supplies and epidemic prevention materials bound for Hong Kong amid the latest outbreak of COVID-19 across the country. Under the new arrangement, all cross-border trucks should follow a centralized transfer in three designated checkpoints, namely Wenjindu, Huanggang and Shenzhen Bay checkpoints, after entering Shenzhen. The cross-border drivers are required to hand over the vehicles to mainland drivers at these checkpoints. Meanwhile, cross-border drivers will be required to provide a negative 24-hour nucleic acid test certificate to enter Shenzhen and take nucleic acid tests each time they enter the city.