China reported 30 new coronavirus cases on the mainland for June 5, up from 24 cases a day earlier, the country's health authority said in a statement on Sunday.

Of the new patients, 23 were imported, the National Health Commission said, and the seven local cases were all in southern Guangdong province. There were no new deaths.

China also reported 18 new asymptomatic infections, compared with 28 a day earlier. China does not classify symptomless infections as confirmed cases.

As of June 5, China had a total of 91,248 confirmed COVID-19 cases. Its death toll stood unchanged at 4,636.