The newly infected people on the 12th involved Liu Xiaofeng from Chaoyang, Changping, and Tongzhou districts. From 0:00 to 24:00 on September 11, Beijing added 14 new cases of local new coronary pneumonia virus infections, all of which were quarantine observers, of which 7 were in Changping District. , 5 cases in Chaoyang District, and 2 cases in Haidian District; all were mild. From 0:00 to 15:00 on September 12, 15 new cases of local new coronary pneumonia virus infection were added, all of whom were quarantined observers. Among them, there were 13 cases in Chaoyang District, 1 case in Changping District and 1 case in Tongzhou District; 9 cases of mild, asymptomatic infection 6 cases.