March 2022 1 1. Official website shows that the epidemic prevention and control headquarters of Changchun City began to implement the city closure measures on March 1 1 2022. The closure of cities in epidemic areas refers to the measures of closed management of specific areas in order to prevent the further spread and spread of the epidemic. These measures usually include restricting people's access, suspending public transport and closing business premises. During the epidemic, residents need to abide by relevant regulations and cooperate with the government to fight the epidemic.