Covid-19 outbreak, resulting in a new tightening of curbs since Thursday. At least two districts have closed some entertainment venues.
The capital city had only relaxed curbs less than two weeks ago that had been imposed to fight a major outbreak that began in April.
The sprawling Universal Beijing Resort - a theme park on the city's outskirts - on Friday rescinded a plan to reopen.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.
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 have begun a new round of Covid tests.