At present, the prevention and control work in COVID-19 stipulates that you need to show your health code, trip code and 48-hour negative report of nucleic acid test when you get off the expressway. At present, COVID-19 is distributed in many places in China, and the prevention and control measures in various places have been upgraded. Prohibiting people and vehicles from moving across regions in high-risk areas is the top priority of prevention and control work. It takes 48 hours to get off the expressway, and the nucleic acid test is negative, and the health code is double green.