A community worker views an app on mobilephone which local residents using to update their daily body temperatures at Tanhualin community in Wuchang District in Wuhan, central China's Hubei Province, Feb. 9, 2020. (Xinhua/Li He)

A community worker dispenses protective materials to local residents at Tanhualin community in Wuchang District in Wuhan, central China's Hubei Province, Feb. 9, 2020. (Xinhua/Li He)

A community worker delivers food to a local resident at Tanhualin community in Wuchang District in Wuhan, central China's Hubei Province, Feb. 9, 2020. (Xinhua/Li He)

A community worker makes a phone call to dispense daily necessities to local residents at Tanhualin community in Wuchang District in Wuhan, central China's Hubei Province, Feb. 9, 2020. (Xinhua/Li He)