In 2022 1 1 20, Lanzhou was closed to the city and the epidemic situation was serious. According to the relevant public information, as of February 3, 2022/KLOC-0 and February 20, 20221/KLOC-0, there were many newly confirmed cases, and the epidemic situation was serious, belonging to high-risk areas. According to the requirements of the epidemic prevention and control office, residents stayed at home and traffic was suspended.