Shanghai - China's capital Beijing is experiencing an "explosive" COVID-19 outbreak, after it relaxed curbs less than two weeks ago that had been imposed to fight a major outbreak that began in April.

The current outbreak is connected to Heaven Supermarket Bar, a government spokesman said on Saturday. The country’s commercial hub, Shanghai, conducted mass testing to contain a jump in cases tied to a hair salon.

So far, 115 cases and 6,158 close contacts linked to the bar have been reported, throwing the city of 22 million back into a state of anxiety.

The capital had registered 46 new local cases on Saturday as of 3 p.m. (0700 GMT), all people already in isolation or under observation, health official Liu Xiaofeng said.

The sprawling Universal Beijing Resort - a theme park on the city's outskirts - on Friday rescinded a plan to reopen. City authorities said three of its workers had visited the Heaven Supermarket bar.

Many neighbourhoods in the capital have been put under lockdown, with residents told to stay home.

In Shanghai, officials announced three new confirmed local cases and one asymptomatic case detected outside quarantined areas on Saturday, as nearly all the city's 25 million residents began a new round of COVID tests.

Shanghai, China’s most populous city only lifted a gruelling two-month COVID-19 lockdown on June 1.

In total, mainland China reported 210 new coronavirus cases for June 10, of which 79 were symptomatic and 131 were asymptomatic, the National Health Commission said.

As of Friday, mainland China had confirmed 224,659 cases with symptoms. India reported 8582 new cases yesterday.