The Liwan district of Guangzhou, Guangdong province, required the registered population and temporary residents to take the Covid-19 test on Wednesday. Photo: Caixin/Liang Yingfei.

People line up for the Covid-19 test on Shangxiajiu Pedestrian Street in Guangzhou on Wednesday night. Photo: Caixin/Liang Yingfei

Residents wait for the Covid-19 test on Shangxiajiu Pedestrian Street on Wednesday. Photo: Caixin/Liang Yingfei

A worker holds a notice that reads that vaccinated people don’t need to take the Covid-19 test on Shangxiajiu Pedestrian Street on Wednesday. Photo: Caixin/Liang Yingfei

A couple waits to take the Covid-19 test on Shangxiajiu Pedestrian Street on Wednesday night. Photo: Caixin/Liang Yingfei

People line up for the Covid-19 test at the Fangcun Station testing site on Wednesday in Guangzhou. Photo: Caixin/Liang Yingfei

A medical worker conducts a test for a resident on Wednesday at the Huangsha Station testing site in Guangzhou. Photo: Caixin/Liang Yingfei

Residents wait for the Covid-19 test at 2 am on Thursday in Liwan district in Guangzhou. Photo: Caixin/Liang Yingfei

A medical worker takes off the Personal Protective Equipment (PPE) after five hours of work on Thursday in Liwan district. Photo: Caixin/Liang Yingfei

Covid-19 testing is still going on at 4 am on Thursday in Liwan district. Photo: Caixin/Liang Yingfei