China has reported its highest daily total of new coronavirus cases in two months after Beijing's largest wholesale food market was shut down following a rise in local infections.
There were 57 confirmed cases in China in the 24 hours to midnight on Saturday, the National Health Commission reported.
It was the highest daily toll since mid-April and included 36 in Beijing.
The new cases come amid mounting concern over a second wave of the COVID-19 pandemic.
China had relaxed most of its anti-virus controls after the ruling Communist Party declared victory over the disease in March.
On Saturday, the Xinfadi market on Beijing's southeastern side was closed and 11 neighbourhoods around it were locked down after more then 50 people in the capital tested positive - the first confirmed cases in 50 days in the city of 20 million people.
An official said the Fengtai district was in "wartime emergency mode" and tourism banned in the Chinese capital.