FILE - In this June 4, 2007, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing as Hong Kong marks the 10th anniversary of its handover from British to Chinese rule on July 1, 2007. (AP Photo/Vincent Yu, File)

FILE - In this June 4, 1998, file photo, thousands of people held a candlelight vigil in the heavy rain at Victoria Park in Hong Kong to mark the ninth anniversary of the military crackdown in Tiananmen Square on a pro-democracy student movement in Beijing on the same day. The memorial is also the first time held under the Chinese rule since the British handover of Hong Kong in the previous year. (AP Photo/Vincent Yu, File)

FILE - In this June 4, 1999, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the 10th anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Vincent Yu, File)

FILE - In this June 4, 2012, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Kin Cheung, File)

FILE - In this June 4, 2020, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Vincent Yu, File)

FILE - In this June 4, 2015, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Kin Cheung, File)

This combination of images taken between 1997 and 2020 shows the thousands of people who attended the June 4th candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the 1989 military crackdown on a pro-democracy student movement in Beijing. Hong Kong has been one of just two cities in China allowed to mark the bloody crackdown on pro-democracy protesters in Beijing’s Tiananmen Square in 1989. Top row from left; 1997, 1998, 1999, 2000, 2001 and 2002. Second row from left; 2003, 2004, 2005, 2006, 2007 and 2008. Third row from left; 2009, 2010, 2011, 2012, 2013 and 2014. Bottom row from left; 2015, 2016, 2017, 2018, 2019 and 2020. (AP Photo/Vincent Yu)

FILE - In this June 4, 1997, file photo, thousands of people attend a candlelight vigil at Hong Kong's Victoria Park, to mark the 8th anniversary of the military crackdown on a pro-democracy student movement in Beijing on the same day in 1989, as Hong Kong entered its last month as a British colony. (AP Photo/Franki Chan, File)

FILE-In this June 4, 2005, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the 16th anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Vincent Yu)

FILE - In this June 4, 2009, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Vincent Yu, File)

FILE - In this June 4, 2013, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Kin Cheung, File)

FILE - In this June 4, 2011, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Kin Cheung, File)

FILE - In this June 4, 2019, file photo, thousands of people attend a candlelight vigil in Hong Kong's Victoria Park to mark the anniversary of the military crackdown on a pro-democracy student movement in Beijing. (AP Photo/Vincent Yu, File)