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CORRECTED-Amid gleaming skyscrapers, Hong Kong's poor set aside hardships and join protests

(Corrects date of Carrie Lam policy address in paragraph 28)

By Poppy McPherson and Felix Tam

HONG KONG, Sept 30 (Reuters) - Just before midnight in Hong Kong's Mong Kok district, a slight man in his seventies peels away from a crowd of protesters jeering at police. Behind him, a young woman calls out, "Be safe!"

They make an improbable pair: she a smartly dressed 24-year-old; he an elderly activist who has for decades been sleeping on the streets of one of the wealthiest – and most unequal – cities on earth.

Bringing the two together is a movement that began in June with protests against a bill that would have allowed extradition to mainland China. The proposed legislation has since been withdrawn.

The demonstrations have since spiralled into a struggle over the future of the Chinese-ruled city that has drawn people from a broad cross-section of society. Some live on the breadline, but they have set aside their grievances to support a movement they hope will secure a better future for all.

"Even though we are poor, we still support the five demands," said the 73-year-old, Lou Tit-Man, referring to a five-point agenda that includes calls for universal suffrage and for hundreds of arrested protesters to be pardoned.

While others organise on encrypted apps like Telegram, Lou Tit-Man follows news of the demonstrations on his shortwave radio, one of the few possessions he has managed to keep from thieves, along with a mask picked up after one scuffle.

Known locally as "Iron Man", a play on his Chinese name and reputation for resilience, he spent four months in jail during the 2014 "Umbrella Movement" that paralysed the city but failed to win major concessions from Beijing.

In his shirt pocket he carries a crumpled copy of an article about him in a local newspaper, relating how he spent his government subsidies to buy food and water for the mostly young protesters.

"I want the next generation to have a better life," he said, "I put all my heart and soul into the social movement."

This year's rallies have brought thousands of people onto the streets weekend after weekend, shouting slogans like "stand with Hong Kong" and "revolution of our time" that express a growing discontent with what is seen as creeping Chinese interference in the city.

The government has called for dialogue and said it is willing to "take forward constitutional development" in accordance with the law.

Recent demonstrations have often erupted into violence, with black-clad protesters setting fires and vandalising metro stations as police fired tear gas, pepper spray, and water cannon.