Local residents queue up for nucleic acid tests at a residential area in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region, Oct. 20, 2021. As of 7 a.m. Wednesday, Inner Mongolia had 12 locally transmitted confirmed COVID-19 cases under medical treatment, the regional health commission said. (Xinhua/Bei He)

Photo taken on Oct. 20, 2021 shows a residential area under temporary lockdown due to COVID-19 control and prevention measures in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region. As of 7 a.m. Wednesday, Inner Mongolia had 12 locally transmitted confirmed COVID-19 cases under medical treatment, the regional health commission said. (Xinhua/Bei He)

Staff members carry bags of daily necessities outside a supermarket in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region, Oct. 20, 2021. As of 7 a.m. Wednesday, Inner Mongolia had 12 locally transmitted confirmed COVID-19 cases under medical treatment, the regional health commission said. (Xinhua/Bei He)

A medical worker disinfects facilities at a residential area in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region, Oct. 20, 2021. As of 7 a.m. Wednesday, Inner Mongolia had 12 locally transmitted confirmed COVID-19 cases under medical treatment, the regional health commission said. (Xinhua/Bei He)

A medical worker takes a swab sample from a child for nucleic acid test at a residential area in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region, Oct. 20, 2021. As of 7 a.m. Wednesday, Inner Mongolia had 12 locally transmitted confirmed COVID-19 cases under medical treatment, the regional health commission said. (Xinhua/Bei He)

A medical worker takes a swab sample from a resident for nucleic acid test at a residential area in Ejina Banner of Alxa League, north China's Inner Mongolia Autonomous Region, Oct. 20, 2021. As of 7 a.m. Wednesday, Inner Mongolia had 12 locally transmitted confirmed COVID-19 cases under medical treatment, the regional health commission said. (Xinhua/Bei He)

来源：Xinhua