On Monday, 223 new cases were reported in China, including 80 in the virus-hit port city of Tianjin, and nine others, including cases of Omicron, in Guangzhou in the south of the country.

Another 68 cases have been reported in the central province of Henan, where partial containment measures and a massive testing campaign have been put in place for several million residents.

Zhuhai, on the border with Macau, asked residents to avoid leaving the city after detecting a handful of Omicron cases and began testing across the city from Monday.

Schools have been closed.

Meanwhile, in the historic city of Xi'an, in the north of the country, new infections have slowed sharply after almost a month of confinement.

Sixty new imported cases were also recorded on Monday, as China maintains strict border entry controls, including reducing the number of flights and a "circuit breaker" policy under which routes are interrupted if the number of imported infections is too high.

A resident is tested for Covid-19 on January 14, 2022 in Xi'an, China STR AFP / Archives

Athletes and representatives have already started arriving in the capital ahead of the Games, immediately entering a tightly controlled bubble that separates them entirely from the rest of the population.

After a local case of Omicron was detected in Beijing over the weekend, authorities tightened regulations for people arriving in the capital from other parts of China.

Beijing now requires a negative test before travel and a follow-up test after arrival, with residents urged not to leave the city during the upcoming Lunar New Year holiday.

The infected woman did not leave Beijing and had no contact with other infected people, said health authorities, who tested some 13,000 people living or working in the same area.

Some tourist sites in the capital have also been closed.

China, where the virus first emerged in late 2019, clings to a draconian zero-tolerance policy on coronavirus as the rest of the world reopens its borders.

Screening for Covid-19 in Beijing, January 17, 2022 in China Noel Celis AFP

But this policy has been put to the test in recent weeks with multiple outbreaks of contamination across the country.

© 2022 AFP