A medical professional informs villagers of the ongoing free-of-charge COVID-19 vaccination campaign at Dongming Village, Donglin Township, Wuxing District, Huzhou City of east China's Zhejiang Province, April 27, 2021. (Photo: Xinhua)

The Chinese mainland recorded 13 new COVID-19 cases on Thursday, all from overseas, data from the National Health Commission (NHC) showed on Friday.

No new deaths related to COVID-19 were reported on Thursday, the NHC said.

17 new asymptomatic cases were recorded, while 318 asymptomatic patients are under medical observation.

The total number of confirmed COVID-19 cases on the Chinese mainland stands at 90,739, with the death toll unchanged at 4,636.