More than 100,000 people who were given nucleic acid tests in Feixi County in east China's Anhui Province on Saturday tested negative for COVID-19.

The countywide nucleic acid tests took place after one more locally transmitted COVID-19 case was reported on Friday. It was the second case in Feixi and the third in Anhui since the first confirmed case of a 29-year-old female in Lu'an City was reported on Thursday.

Meanwhile, large-scale nucleic acid testing targeting all 500,000 people in Bayuquan District, Yingkou City, northeast China's Liaoning Province, continued on Saturday. The second round of nucleic acid tests in this district, where most of the new cases emerged, is expected to commence on Sunday.

As of 7 p.m. on Saturday, a total of six confirmed COVID-19 cases were reported in Liaoning Province, according to the provincial health commission.

Nine residential communities and villages in Yingkou have been upgraded to medium-risk areas for COVID-19 and put under closed-off management, according to the city government.

The city government has capped the visitor flow in public places to under 50 percent of the designed capacity, including shopping malls, supermarkets, theaters, museums and restaurants.

The National Health Commission (NHC) has dispatched a work team to Liaoning, and the Liaoning provincial health authority has also sent a team of 30 experts to Yingkou to guide COVID-19 prevention and control efforts, including epidemiological investigation and source tracing.

National capital Beijing has traced 28 close contacts of the reported COVID-19 cases in Anhui, the municipal center of disease prevention and control announced Saturday.

The close contacts, which include a driver of a ride-hailing platform, were found in 11 districts of the city between Thursday and Friday. The driver has tested negative for COVID-19, according to the center.

The center said 167 secondary close contacts have also been found.

As of Saturday, 24 close contacts, 141 secondary close contacts and 231 samples from their surroundings have tested negative for COVID-19. The rest of the samples are being examined.

(With input from Xinhua)