BEIJING, April 22 (Xinhua) -- Here are the latest developments on the novel coronavirus disease (COVID-19) in China:

-- Chinese health authority said Wednesday that it received reports of 30 new confirmed COVID-19 cases on the mainland Tuesday, 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 Tuesday, 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 the previous day, local health authority said.

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