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In this picture taken on September 27, 2016, an artwork of a yellow umbrella that reads (fron L-R) "Civil Disobedience, Umbrella Revolution, Civil Disobedience" by retiree Alexandra Wong, 60, who lives in the neighbouring Chinese city of Shenzhen, is seen on one of the government headquarter's driveways in Hong Kong, on the eve of the second anniversary of the Umbrella Movement. - The sprawling protest camps at the heart of Hong Kong's 2014 pro-democracy "Umbrella Movement" have long gone -- but artist Alexandra Wong is determined to keep the memory alive. Every week the 60-year-old returns to a spot on the driveway outside the city's government headquarters, creating political murals from brightly-coloured tape laid on the tarmac. (Photo by Anthony WALLACE / AFP) / To go with AFP Story: "HONG KONG-CHINA-POLITICS-DEMOCRACY-ARTS", by Aaron Tam (Photo credit should read ANTHONY WALLACE/AFP/Getty Images)

In this picture taken on September 27, 2016, an artwork of a yellow umbrella that reads (fron L-R) "Civil Disobedience, Umbrella Revolution, Civil Disobedience" by retiree Alexandra Wong, 60, who lives in the neighbouring Chinese city of Shenzhen, is seen on one of the government headquarter's driveways in Hong Kong, on the eve of the second anniversary of the Umbrella Movement. - The sprawling protest camps at the heart of Hong Kong's 2014 pro-democracy "Umbrella Movement" have long gone -- but artist Alexandra Wong is determined to keep the memory alive. Every week the 60-year-old returns to a spot on the driveway outside the city's government headquarters, creating political murals from brightly-coloured tape laid on the tarmac. (Photo by Anthony WALLACE / AFP) / To go with AFP Story:  "HONG KONG-CHINA-POLITICS-DEMOCRACY-ARTS", by Aaron Tam        (Photo credit should read ANTHONY WALLACE/AFP/Getty Images)