![](http://www.ecns.cn/hd/2022/01/10/ef8985ce98754ca8bc7613375de83fe5.jpg)
A medical worker takes a swab sample from a resident in Nankai District, north China's Tianjin, January 9, 2022. (Photo: China News Service/Zhang Daozheng)
Tianjin reported two locally transmitted confirmed COVID-19 cases infected with the Omicron variant, according to the municipal headquarters for COVID-19 prevention and control on early Sunday morning. Then the city decided to start a citywide nucleic acid testing.
![](http://www.ecns.cn/hd/2022/01/10/c6bdb037df8e46338e15e986ff890ec8.jpg)
People wait in line for nucleic acid testing in Nankai District, north China's Tianjin, January 9, 2022. (Photo: China News Service/Zhang Daozheng)
![](http://www.ecns.cn/hd/2022/01/10/4ee81b60f894473ab6392cddc17e8a0f.jpg)
Photo shows a site for nucleic acid testing in Xiqing District, north China's Tianjin, January 9, 2022. (Photo: China News Service/Tong Yu)
![](http://www.ecns.cn/hd/2022/01/10/32ba09c0c04a4df4a4cedb386c1e5986.jpg)
Photo shows a site for nucleic acid testing in Xiqing District, north China's Tianjin, January 9, 2022. (Photo: China News Service/Tong Yu)
![](http://www.ecns.cn/hd/2022/01/10/b1aa6ce1b213482f9492cac3e196f551.jpg)
Photo shows a site for nucleic acid testing in Xiqing District, north China's Tianjin, January 9, 2022. (Photo: China News Service/Tong Yu)
![](http://www.ecns.cn/hd/2022/01/10/00c6b67f211843a6b9304a35c20f6a81.jpg)
Photo shows a site for nucleic acid testing in Xiqing District, north China's Tianjin, January 9, 2022. (Photo: China News Service/Tong Yu)