China has reported 66 new coronavirus cases, the largest since the disease was deteced in Wuhan province in April, prompting the authorities to go into a "wartime" mode to stem the spread of COVID-19 in the capital Beijing which has seen a sudden spike in the number of infections, health officials said on Sunday.
The officials of the China's National Health Commission (NHC) said that 57 new confirmed COVID-19 infections, including 38 domestically transmitted, were reported on Saturday.
Also on Saturday, nine new asymptomatic cases were reported, it said.
Currently, 103 people with asymptomatic symptoms are kept under quarantine.
Asymptomatic cases, also known as silent spreaders,