The Chinese mainland registered 68 new COVID-19 cases on Monday, four from overseas and 64 domestically transmitted, the National Health Commission said on Tuesday.

Of the domestically transmitted cases, 57 were reported in Xinjiang Uygur Autonomous Region, six in the Liaoning Province and one in Beijing, the National Health Commission said in its daily report.

No deaths related to the disease were reported Monday, while 16 COVID-19 patients were discharged from hospitals. There were 391 patients still being treated, including 20 in a severe state, the commission said in its daily report.

Altogether, 78,934 patients had been discharged from hospitals by Monday, the report said, adding that a total of 83,959 confirmed COVID-19 cases had been reported on the Chinese mainland, including 4,634 deaths.

The total confirmed cases in the Hong Kong and Macao special administrative regions and the Taiwan region are as follows:

Hong Kong: 2,778 (1,486 recoveries, 22 deaths)

Macao: 46 (46 recoveries)

Taiwan: 462 (440 recoveries, seven deaths)

57 cases in Xinjiang Uygur Autonomous Region

The authorities in China's Xinjiang Uygur Autonomous Region reported 57 new confirmed COVID-19 cases on Monday, all of them from Urumqi. 

Eighteen of the newly confirmed patients were previously asymptomatic cases.

A total of 13 new asymptomatic cases were reported in the region on Monday.

Six cases in Liaoning Province 

China's Liaoning Province reported six new confirmed COVID-19 cases on Monday. All newly confirmed patients are in the city of Dalian and were previously asymptomatic cases, according to the commission.

Dalian also reported 12 new asymptomatic cases on Monday.

As of Monday, the province had reported a total of 209 confirmed cases, including 33 imported ones. Forty-seven patients are receiving treatment. There are 42 asymptomatic cases still under medical observation.