Staff members carry out disinfection at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)

Property management staff set up a temporary nucleic acid testing station at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)

A staff member carries out disinfection at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)

A nearby vendor (R) delivers daily necessities that residents bought online at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)

Property management staff load vegetables donated by warm-hearted citizens onto shopping trolleys before distributing them to residents in home quarantine at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)

Residents wait for deliverymen who will bring them daily necessities they bought online at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)

A resident waits for deliveryman who will bring him the daily necessities he bought online at a community in Pidu District of Chengdu, southwest China's Sichuan Province, Dec. 11, 2020. By 6 p.m. Friday, Chengdu, capital of Sichuan Province, had reported 10 confirmed COVID-19 cases and two asymptomatic cases in the recent emergence of the epidemic, said Xie Qiang, director of the municipal health commission. Parts of a residential compound in Chengdu's Pidu District were classified as medium-risk areas for COVID-19 starting from 9 p.m. on Thursday. (Xinhua/Shen Bohan)