Residents waiting to take nucleic acid tests for Covid-19 gather in a public square Tuesday in Chengdu, Southwest China’s Sichuan province.

A medical worker registers the personal information of a resident going to take a nucleic acid test. Photo: The Paper

A resident prepares to take a nucleic acid test. China reported 15 new coronavirus cases Tuesday, including four that were locally transmitted, all in Chengdu.

A resident gets tested Tuesday night. Photo: The Paper

Residents line up to get tested. A total of 255,200 residents in Chengdu had received nucleic acid tests as of Tuesday, according to local authorities. Six people tested positive.

Police officers stand guard in front of a closed night club where a 20-year-old woman was confirmed with the virus on Tuesday.

A worker disinfects the ground in front of a residential community that was sealed off after a person living there tested positive for Covid-19.