(220426) -- BEIJING, April 26, 2022 (Xinhua) -- A medical worker takes a swab sample from a citizen at a makeshift nucleic acid testing site during a mass testing for COVID-19 in Haidian District, Beijing, capital of China, April 26, 2022. Beijing will conduct three rounds of nucleic acid testing in 11 areas from Tuesday to Saturday in efforts to curb the risk of COVID-19, local authorities said at a press conference Monday. The testing will cover people in the districts of Xicheng, Dongcheng, Haidian, Fengtai, Shijingshan, Fangshan, Tongzhou, Shunyi, Changping, Daxing and Beijing Economic-Technological Development Area, said Xu Hejian, spokesperson of the municipal government of Beijing. (Xinhua/Ren Chao)