Millions of Beijing residents have queued up for another round of COVID-19 tests as China's capital seeks to trace and isolate every infection to contain a small but stubborn outbreak - and avoid a Shanghai-style prolonged lockdown.
Strict COVID-19 curbs in Beijing, Shanghai and dozens of other major cities across China are taking a psychological toll on its people, weighing on the world's second-largest economy and disrupting global supply chains and international trade.
But Chinese authorities are unwavering in their commitment to stamp out the coronavirus, rather than live with COVID like many countries that are easing or ditching virus measures.
Most of the 25 million people in the commercial hub of Shanghai, China's most populous city, have been confined to housing compounds for more than a month, with many complaining of not being able to get food or to access emergency health care or other basic services.
Parts of Shanghai have seen their risk levels officially downgraded to the point where government rules would in theory allow them to leave their residences.
But while some were allowed out for brief walks or grocery trips, most were still stuck behind the locked gates of their compounds, causing widespread frustration and occasionally leading to rare altercations with hazmat-suited authorities.
On Sunday, residents lined up for another round of tests in Beijing's Chaoyang, Fangshan and Fengtai districts, and others where infections had been detected over the past two weeks.
It has become an almost daily routine in the capital.
Even if they are not subject to the mass tests, many still need to show a recent negative result to get to work or enter various venues.
Beijing has closed gyms and entertainment venues, banned dine-in services at restaurants and shut scores of bus routes and almost 15 per cent of its sprawling subway system.
The streets were less hectic than usual, with many not wanting to risk any activity that could classify them as close contacts of COVID patients, forcing them into quarantine.
Businesses that remained open were suffering.
A barber who asked to be identified only by his surname Song said his salon at a high-end shopping mall in Chaoyang has seen far fewer clients since the outbreak.
"They're afraid of getting abnormalities in their health apps," Song said, referring to the mobile monitoring software all residents must use.
"North of us are malls and offices that have been sealed, and their apps might mark them as close contacts if they came."
Beijing's daily COVID cases are in the dozens, much lower than Shanghai's at this point in its own outbreak, when infections were in the triple digits and rising.
Shanghai's cases have fallen for a ninth day, Sunday's data showed, but remained in the thousands.
Like other cities in China, Shanghai is building thousands of permanent PCR testing stations. With most residents still indoors, this seems to anticipate a gradual return to normal life when people are back out on the streets.
But authorities have warned that remains a long way off.
Chinese leaders meeting last week said the nation would fight any comment or action that distorted, doubted or repudiated its COVID policy.