Residents are now prohibited from leaving their homes unless in an emergency. In addition, the city administration said on the WeChat social network that a pass system is in effect in residential complexes.
According to the latest data published by China's National Health Commission, six local COVID-19 infections were detected in Lanzhou on Monday. A total of 39 local coronavirus cases have been confirmed in the city since 18 October.
The population of Lanzhou city exceeds 3.7 million people.