The annual candlelight vigil that commemorates the Tiananmen Square crackdown will this year also pay tribute to some 300 mainlanders arrested for backing Hong Kong's Occupy movement. They may have nothing to do with June 4, but expressing support for them would highlight the shared destiny of the democratic development of both Hong Kong and China, said Albert Ho Chun-yan, chairman of the Alliance in Support of Patriotic Democratic Movements of China, which is organising the vigil. At the Victoria Park vigil, speakers will convey the plight of those arrested across the border. Some were arrested after posting on social media photos of themselves holding placards that read "we support the umbrella movement." Most were in Guangdong, Beijing and Shanghai. Ho said the young activists had only done "simple, peaceful acts. They were innocent." At least 20 of them were still being detained without legal proceedings initiated against them yet, Ho said. He said the figures were compiled by activist groups that had been approached to help those arrested, such as Amnesty International and China Human Rights Lawyers Concern Group, which Ho co-founded. The move would also emphasise the link and the spirit of "mutual support" between democracy movements in Hong Kong and China, a relationship increasingly rejected by the younger generation in the city, Ho said. This year, leaders of student unions at several universities have decided to skip the vigil in protest against one of the alliance's slogans: to "build a democratic China". They think Hongkongers should mind their own business and stop the fruitless fight for the reversal of the official verdict that the protests on June 4 amounted to a "counter-revolutionary riot". Hong Kong is the only place in China to allow public commemoration of the students who took part in pro-democracy protests and were killed in the military crackdown. Ho said vigil attendees would hear an audio recording of Wang Chaohua, one of the 21 June 4 student leaders still on Beijing's "most wanted" list. She fled to the United States. In Hong Kong, a total of 160 people have been prosecuted so far for various offences related to their participation in the Occupy protests, according to information released by the Security Bureau yesterday. The alliance has also faced litigation over its June 4 Museum. Since it opened in a Tsim Sha Tsui building last year, the chairman of the block's owners' association has claimed that the use of the 800 sq ft unit breached the occupation permit. The High Court heard the case yesterday. "The owner has never stopped harassing us," Ho said. "In the long run, if we can find a space at least doubling the size, we should move."