
Aerial photo taken on Aug. 14, 2021 shows "Falcon" air-inflated testing labs for COVID-19 nucleic acid testing at Yangzhou International Exhibition Center in Yangzhou, east China's Jiangsu Province.(Photo: Xinhua)

Medical workers are seen at a "Falcon" air-inflated testing lab for COVID-19 nucleic acid testing at Yangzhou International Exhibition Center in Yangzhou, east China's Jiangsu Province, Aug. 14, 2021.(Photo: Xinhua)

A medical worker checks at a "Falcon" air-inflated testing lab for COVID-19 nucleic acid testing at Yangzhou International Exhibition Center in Yangzhou, east China's Jiangsu Province, Aug. 14, 2021.(Photo: Xinhua)

Medical workers put on protective suits at a "Falcon" air-inflated testing lab for COVID-19 nucleic acid testing at Yangzhou International Exhibition Center in Yangzhou, east China's Jiangsu Province, Aug. 14, 2021.(Photo: Xinhua)