Medical workers work at a nucleic acid testing site in Chengguan District of Lanzhou, northwest China's Gansu Province, Oct. 19, 2021. Lanzhou launched nucleic acid testing on Tuesday for residents living or working near medium-risk areas in Chengguan District. (Xinhua/Chen Bin)
Lanzhou launches nucleic acid testing in Chengguan District
Source: Xinhua| 2021-10-19 21:42:12|Editor: huaxia