BEIJING — China has placed millions of its citizens under renewed lockdown following fresh outbreaks of COVID-19, authorities reported Tuesday, as the government persists in its hard-line policy on containing the virus.

The measures affected about half of the 6 million residents of the port city of Dalian, along with an undisclosed number in Chengde and Shijiazhuang in Hebei province, both around three hours from the capital Beijing. Dalian’s lockdown was due to last five days, although authorities have in past extended restrictions depending on the number of new cases.

Beijing has been relatively unaffected thus far, although travel in and out of the capital has been discouraged and residents are subject to testing on an almost daily basis. Partial lockdowns have also been imposed on cities such as Chengdu in the southwest, Shenyang in the northeast and Jishui in the southeast. Such measures are mandated under China’s “zero-COVID” policy, which contrasts starkly with moves by other nations to coexist with the virus through gradual easing of restrictions, vaccinations, improved therapeutics and voluntary isolation.

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