Fengyang sub-district residents queue for hours to get the nucleic acid test on Sunday in the Haizhu district of Guangzhou, South China’s Guangdong province. Over 210,000 people live in this area. Photo: Caixin/Liang Yingfei

Residents cover their heads with plastic sheets while waiting in the rain for the test in the Haizhu district on Sunday. Five testing centers have been set up in this district. Photo: Caixin/Liang Yingfei

Residents use plastic sheet to take shelter from the rain while waiting for the test on Sunday in the Haizhu district. Photo: Caixin/Liang Yingfei

A resident covers his head with a plastic bag to avoid the rain while lining up for the test on Sunday in the Haizhu district. Photo: Caixin/Liang Yingfei

Residents share an umbrella while lining up for the test in Guangzhou on Sunday. Photo: Caixin/Liang Yingfei

A resident waits to get the test at a Covid-19 testing center in Guangzhou on Sunday. Photo: Caixin/Liang Yingfei

A resident takes a short nap while waiting for the test on Sunday in Guangzhou. Photo: Caixin/Liang Yingfei

A volunteer prompts residents to scan the QR code to register for the test at one of the testing centers on Sunday in Haizhu district, Guangzhou. Photo: Caixin/Liang Yingfei

People wait in line in humid conditions to get the test on Sunday in Guangzhou. Photo: Caixin/Liang Yingfei

Residents form a long queue for the test on Sunday in Haizhu district. Photo: Caixin/Liang Yingfei