BEIJING — Here are the latest developments on the novel coronavirus disease (COVID-19) in China:

— Chinese health authority said on April 22 that it received reports of 30 new confirmed COVID-19 cases on the mainland on April 21, of which 23 were imported.

The other seven new cases were domestically transmitted, the National Health Commission said in a daily report, noting that all were reported in Heilongjiang province.

Also on April 21, 42 new asymptomatic cases, including seven from abroad, were reported on the mainland. The commission said 991 asymptomatic cases, including 172 from abroad, were still under medical observation.

— No new confirmed cases of the novel coronavirus disease or new deaths from the disease were reported in Central China's Hubei province on April 21, local health authority said.

The provincial health commission said 28 new asymptomatic cases were reported and 24 were ruled out on April 21, leaving 548 asymptomatic cases still under medical observation.