People walk at a subway station during morning rush hour, as the coronavirus disease (COVID-19) pandemic continues in the country, in Beijing, China January 17, 2022.

People walk at a subway station during morning rush hour, as the coronavirus disease (COVID-19) pandemic continues in the country, in Beijing, China January 17, 2022.

People line up to take nucleic acid tests at a testing site outside a hospital following the coronavirus disease (COVID-19) outbreak in Beijing, China January 17, 2022.

A woman receives a throat swab test as the coronavirus disease (COVID-19) pandemic continues in Beijing, China, January 17, 2022.

A man receives a throat swab test at a street booth as the coronavirus disease (COVID-19) pandemic continues in Beijing, China, January 17, 2022.

A man wearing face masks following the coronavirus disease (COVID-19) outbreak uses his cellphone in front of a billboard of Bing Dwen Dwen, the Beijing 2022 Winter Olympic Mascot, outside Beijing Railway Station as the travel rush starts ahead of the Chinese Lunar New Year of the Tiger, also known as the Spring Festival, in Beijing, China January 17, 2022.

A woman receives a throat swab test as the coronavirus disease (COVID-19) pandemic continues in Beijing, China, January 17, 2022.

People wearing face masks following the coronavirus disease (COVID-19) outbreak walk outside Beijing Railway Station as the travel rush starts ahead of the Chinese Lunar New Year of the Tiger, also known as the Spring Festival, in Beijing, China, January 17, 2022.

People wearing face masks following the coronavirus disease (COVID-19) outbreak walk on a footbridge outside Beijing Railway Station as the travel rush starts ahead of the Chinese Lunar New Year of the Tiger, also known as the Spring Festival, in Beijing, China, January 17, 2022.

People wearing protective masks walk on a street, following new cases of the coronavirus disease (COVID-19), in Shanghai, China January 17, 2022.

A medical worker takes a swab sample from a woman for nucleic acid testing at a testing site outside a hospital following the coronavirus disease (COVID-19) outbreak in Beijing, China January 17, 2022.

A woman receives a throat swab test at a street booth as the coronavirus disease (COVID-19) pandemic continues in Beijing, China, January 17, 2022.

People wearing protective masks stand in front of Jing'an Temple, following new cases of the coronavirus disease (COVID-19), in Shanghai, China January 17, 2022.

People walk at a subway station during morning rush hour, as the coronavirus disease (COVID-19) pandemic continues in the country, in Beijing, China January 17, 2022.

Police officers, wearing protective suits to prevent the spread of the coronavirus disease (COVID-19), inspect the health information of passengers at Nanjing Railway Station, as the Spring Festival travel rush kicks off ahead of the Chinese Lunar New Year, in Nanjing, Jiangsu province, China January 17, 2022. China Daily via REUTERS

A woman receives a throat swab test at a street booth as the coronavirus disease (COVID-19) pandemic continues in Beijing, China, January 17, 2022.

A woman receives a throat swab test as the coronavirus disease (COVID-19) pandemic continues in Beijing, China, January 17, 2022.

A man wearing a face mask following the coronavirus disease (COVID-19) outbreak walks outside Beijing Railway Station as the travel rush starts ahead of the Chinese Lunar New Year of the Tiger, also known as the Spring Festival, in Beijing, China January 17, 2022.

Student passengers show their nucleic acid testing results to workers in protective suits, following the coronavirus disease (COVID-19) outbreak, to enter Xian North Railway Station as the Spring Festival travel rush kicks off ahead of the Chinese Lunar New Year, in Xian, Shaanxi province, China January 17, 2022. cnsphoto via REUTERS

Security guards wearing protective masks walk on a street, following new cases of the coronavirus disease (COVID-19), in Shanghai, China January 17, 2022.