WRAPUP 5-'Entry only. No exit:' Beijing sees more COVID closures as anger grows in Shanghai

(Adds analyst comment)

* Beijing closes more gyms, malls, cinemas to contain outbreak

* New COVID cases in the capital remain in the dozens

* China to step up policy support for economy- Politburo meeting

By Martin Quin Pollard and David Stanway

BEIJING/SHANGHAI, April 29 (Reuters) - China's capital Beijing closed more businesses and residential compounds on Friday, with authorities ramping up contact tracing to contain a COVID-19 outbreak, while resentment at the month-long lockdown in Shanghai grew.

In the finance hub, fenced-in people have been protesting against the lockdown and difficulties in obtaining provisions by banging on pots and pans in the evenings, according to a Reuters witness and residents.

A video shared on social media, whose authenticity could not be immediately verified, showed a woman warning people via a loud-hailer not to do so, saying such gestures were being encouraged by "outsiders."

The Shanghai government did not immediately respond to a request for comment.

In Beijing, authorities were in a race against time to detect COVID cases and isolate those who have been around them.

A sign placed outside a residential complex read "Entry only. No exit."

Polish resident Joanna Szklarska, 51, was sent to a quarantine hotel as a close contact, but she refused to share the room, which had only one bed, with her neighbour.

She was sent back home, where authorities installed a front door alarm. Then she was called back to the hotel, where she now has her own room.

"Nothing makes sense here," the English-language consultant said by phone.

At a regular press conference on Friday, Chinese health officials did not respond to questions on whether Beijing will go under lockdown or what circumstances might prompt such measures.

The severe curbs in China have appeared surreal to many parts of the world where people have chosen to live with the virus.

And the frequent signs of frustration among citizens will be uncomfortable for China's ruling Communist Party, especially as President Xi Jinping is widely expected to secure a third leadership term this fall.

Nomura estimates 46 cities are currently in full or partial lockdowns, affecting 343 million people. Societe Generale estimates that provinces experiencing significant mobility restrictions account for 80% of China's economic output.

'HELLO CITIZENS!'

New COVID cases in Beijing remain in the dozens, officials said on Friday, a far cry from Shanghai's numbers.

In Beijing's Chaoyang district, the first to undergo mass testing this week, started the last of three rounds of screening on Friday among its 3.5 million residents. Most other districts are due for their third round of tests on Saturday.