During the epidemic prevention and control period, Sukang Code, as an important voucher for the daily travel of the general public, is the main basis for the inspection of epidemic prevention personnel. "Su Kang code" is marked with three colors of red, yellow and green, and the green code and the vehicles they drive are marked with bright codes in the province (in order to improve the prevention and control accuracy, the side code must match the management and control requirements of medium-risk areas and high-risk areas); The yellow code and red team and the vehicles they drive are prohibited from passing through the city.