Officers declared in a assertion Sunday that "all villages, communities and structures will be totally closed" in Anxin.
Anxin is around 150km (90 miles) south of Beijing.
After China largely brought the virus under control, hundreds have been infected in Beijing and cases have emerged in neighbouring Hebei province in recent weeks.
But the greatest concern remains in the Fengtai district and now at high risk the area where beef and lamb are sold in the Xinfadi market, where the current outbreak broke out.More news: Know why Andy Murray left Brits exhibition tournament
The National Health Commission (NHC) said in a statement that five of the new Covid-19 cases were so-called imported infections involving travellers from overseas, compared with three such cases reported a day earlier.
While this is a small number compared to thousands of daily cases in India and the USA, the Chinese authorities said they reacted as quickly as possible to contain the virus spread. A massive wave of fresh testing was also rolled out.
It also claimed the local outbreak was not caused by the same virus strains from Wuhan City, the once epicenter of the coronavirus epidemic in China, nor the one spread in Beijing's domestic cases before April.
China imposed a strict lockdown on almost half a million people in a province surrounding Beijing to contain a fresh coronavirus cluster on Sunday, as authorities warned the outbreak was still "severe and complicated".More news: Interpreting Prime Minister Narendra Modi’s Statement on China
Since June 11 when Beijing reported its first case in the current outbreak, it checked the health of nearly eight million people, 35.7% of its population; and proposes to increase the figure with a reduction in the cost of the tests and fitting out more sites to carry them out.
Six months after the virus first emerged from China, the coronavirus has sickened over 10 million people and killed more than 500,000 and the pandemic is gaining new momentum in the Americas.
The Jewish tradition of Shiva where people go to the home of mourning relatives for seven days has also been disrupted.
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