Residents stand in line to get tested in a locked down community in Huai’an, East China’s Jiangsu province, on Thursday. Photo: VCG

A volunteer guides residents to get tested on Thursday at a Covid-19 testing point in Nanjing, East China’s Jiangsu province. Photo: Yang Bo/China News Service, VCG

A resident stands at an entrance of a quarantined neighborhood in Huilongguan, Beijing, on Thursday. Photo: VCG

A medical worker guides a resident to get tested in an ambulance on Thursday in the Huilongguan neighborhood of Beijing. Photo: VCG

A police officer measures a passenger’s body temperature at a toll of the G15 expressway on Thursday in Lianyungang, East China’s Jiangsu province. Photo: VCG

A worker checks passengers’ heath QR code at the northwestern exit of Shanghai Railway Station wearing a protective suit in Shanghai on Thursday. Photo: VCG

Police personnel check passengers’ health QR codes, travel records, and identification cards Thursday in Jinhu county of Huai’an, East China’s Jiangsu province. Photo: VCG

Residents line up outside Yangzhou Shuijian Hospital to get tested in Yangzhou, East China’s Jiangsu province. Photo: VCG

A medical worker conducts a Covid-19 test for a resident in Chengdu, Southwest China’s Sichuan province, on Wednesday morning. Photo: VCG

Residents take Covid-19 tests at 4 a.m. Thursday in a neighborhood in Huilongguan, Beijing. Photo: Zhang Fan/Caixin

Residents line up to get tested in Chengdu on Wednesday morning. Photo: VCG

Multiple neighborhoods in Huilongguan of Beijing are under quarantine on Thursday after the city reported two cases after months. Photo: VCG