North China's Tianjin has finished its citywide nucleic acid testing after recent cases were found to belong to the Omicron variant. Han Jinyan, deputy director of the Tianjin Health Commission, said that Tianjin has tested 11,912,280 people, and the results of 7,892,591 people have been released, with 77 positive cases.
Most of the cases are located in Jinnan District, showing a clear transmission chain.