Mass COVID testing starts in two core Beijing districts after Daxing outbreak By DU JUAN in Beijing, ZHOU WENTING in Shanghai and ZHOU HUIYING in Harbin | China Daily | Updated: 2021-01-23 06:45 Share CLOSE Residents wait in line to receive nucleic acid tests outside the National Center for the Performing Arts in Beijing on Jan 22, 2021. Beijing's Dongcheng and Xicheng districts have arranged nucleic acid tests for all residents on Jan 22 and 23. [Photo by Xu Jingxing/chinadaily.com.cn] Two districts in Beijing's core area launched universal nucleic acid testing for all residents on Friday, after a string of local COVID-19 cases were reported in the capital.