Disease control personnel enter a Covid-19 high-risk community in Linyi, East China’s Shandong province, to conduct nucleic acid tests on residents Friday. China is reimposing Covid restrictions to battle the current resurgence of the virus. Photo: VCG

Workers install a partition in Shanghai’s Huangpu district on Friday. The local government has added 37 Covid-19 medium-risk areas on Monday. Photo: VCG

Residents in Huangpu district, identified as a medium-risk area, queue for nucleic acid tests. Shanghai reported 69 new local cases on Sunday. Photo: VCG

Residents take nucleic acid tests Saturday at a testing point in Guangzhou, South China’s Guangdong province. That same day, three districts of the city conducted mass testing after six health workers tested positive. Photo: Liang Yingfei/Caixin

Residents wait in line at a nucleic acid testing point on Guangzhou’s Shangxiajiu Pedestrian Street in Liwan district. Photo: Liang Yingfei/Caixin

A child queues at a testing site on the Shangxiajiu Pedestrian Street. There were 32 new local cases reported Sunday in Guangdong. Photo: Liang Yingfei/Caixin

A health worker tests a child for Covid-19 Sunday in Lianyungang, East China’s Jiangsu province. The province reported 61 new local cases that day. Photo: VCG

Mass testing kicks off Sunday in Baiyin, Northwest China’s Gansu province. The city’s Huining county is under a seven-day lockdown after reporting one positive Covid-19 case on Sunday. Photo: The Paper