Two of the five confirmed cases were so-called imported infections, while three were locally transmitted in northeastern Chinese city of Jilin.

The number of confirmed cases in the mainland now stands at 82,947 and the death toll at 4,634.

The three domestically-transmitted cases are related to a district in Jilin city called Fengman, which has been classified by Chinese officials as a high-risk area for COVID-19.

Heightened disease control measures in the district include only allowing only one person from a family to go out and purchase daily necessities each day, according to the district's official post on WeChat.

Residents were advised not to leave the city and any who do need to leave must provide a negative test result taken within the previous 48 hours.

Jilin is the second largest city of Jilin province, which borders North Korea and Russia. It temporarily suspended passenger train services last Wednesday.

The number of China's new asymptomatic cases of the coronavirus fell to 12 from 13, the NHC said.

Zhong Nanshan, the Chinese government's senior medical adviser told CNN on Saturday that the danger of a second wave of infections is looming large.

"The majority of... Chinese at the moment are still susceptible to COVID-19 infection because (of) a lack of immunity," Zhong said as quoted in the CNN report. "We are facing (a) big challenge, it's not better than the foreign countries I think at the moment."

Zhong acknowledged that the number of infections were initially under reported in Wuhan but said the government has learned lessons from the SARS epidemic 17 years ago and he thinks all the data will be correct since Jan 23.