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This picture taken on July 20, 2018 shows cardboard collector Au Fung-lan pushing her trolley full of cardboard along a road on her way to a recycling depot in the Kwai Fong district of Hong Kong. - Her fingers are bent from 20 years of collecting cardboard from Hong Kong's streets, but Au Fung-lan says she has no desire to give up the gruelling work. At 67-years-old she is one of around 2,900 collectors, mainly women over the age of 60, whose frail figures are a familiar sight, guiding trolleys loaded with cardboard through a city clogged with traffic and people. (Photo by Isaac LAWRENCE / AFP) / TO GO WITH HongKong-social-environment-elderly-cardboard-collector, FEATURE by Yan ZHAO (Photo credit should read ISAAC LAWRENCE/AFP/Getty Images)

This picture taken on July 20, 2018 shows cardboard collector Au Fung-lan pushing her trolley full of cardboard along a road on her way to a recycling depot in the Kwai Fong district of Hong Kong. - Her fingers are bent from 20 years of collecting cardboard from Hong Kong's streets, but Au Fung-lan says she has no desire to give up the gruelling work. At 67-years-old she is one of around 2,900 collectors, mainly women over the age of 60, whose frail figures are a familiar sight, guiding trolleys loaded with cardboard through a city clogged with traffic and people. (Photo by Isaac LAWRENCE / AFP) / TO GO WITH HongKong-social-environment-elderly-cardboard-collector, FEATURE by Yan ZHAO        (Photo credit should read ISAAC LAWRENCE/AFP/Getty Images)