This followed the reports on fresh cases of COVID-19 more than one year after the country moved to stamp out a slew of outbreaks connected with the Delta variant.
A senior government official in Wuhan told journalists on Tuesday, the city with an estimated 11 million people is would launch a comprehensive nucleic acid testing of all residents in a bid to halt further spread of the virus.
China has confined the residents of entire cities to their homes, suspended domestic transport links and rolled out mass testing in recent days as it battles its largest COVID-19 outbreak in months.
The National Health Commission (NHC) said the country reported 90 new confirmed COVID-19 cases in the mainland on August 2, compared to 98 a day earlier.
This brought the total number of cases to more than 400 in the last 10 days.