Photo taken on Feb. 4, 2021 shows the Huoyan (Fire Eye) COVID-19 testing labs in Harbin, northeast China’s Heilongjiang Province. Twelve Huoyan (Fire Eye) inflatable labs have been put to use recently at Harbin International Conference and Exhibition Center for COVID-19 nucleic acid tests. The labs will maintain 24-hour operation and provide screening service to 200,000 people a day using pooled sample testing. (Xinhua/Wang Song)