A woman wearing a mask passes by masked statues in Shanghai on Wednesday. The city reported 47 local cases that day, while a new round of mass testing is set to begin there on Friday. Photo: Alex Plavevski/The Paper

A man takes a nucleic acid test in Shanghai. The local government had designated 14 areas as medium risk for Covid as of Wednesday. Photo: Alex Plavevski/The Paper

A robot takes throat swabs of residents in Shanghai’s Pudong New Area. Photo: VCG

Passengers take nucleic acid tests at the arrival area of Shanghai Hongqiao International Airport. The local government requires travelers to take Covid tests for three consecutive days once they arrive in the city. Photo: Yin Liqin/China News Service, VCG

Xi’an, the capital of Northwest China’s Shaanxi province, is continuing mass testing in multiple districts after the city reported 22 local cases earlier this week. Photo: VCG

Multiple testing booths are set at a testing point in a county in Southwest China’s Chongqing municipality, which reported 30 local infections on Wednesday. Photo: VCG

Starting on Tuesday, residents in Zhengzhou, the capital of Central China’s Henan province, were required to take Covid-19 tests twice a day for three consecutive days. The city reported 28 new local cases on Wednesday. Photo: Chen Liang/Caixin

Disease control personnel take a boat Tuesday to perform nucleic acid tests on residents in Yueliang village in Southwest China’s Sichuan. The province reported 65 local cases on Wednesday. Photo: The Paper