Most of the people who joined the July 1 protest were university educated, professionals, middle class and aged between 20 and 50, a survey has found. The study, by Hong Kong University's polling programme director Robert Chung Ting-yiu and Chinese University journalism professor Joseph Chan Man, is based on interviews with 1,154 protesters. It found that nearly 60 per cent were at least university educated and 40 per cent were professionals. Sixty per cent were middle class and more than 80 per cent were aged between 20 and 50. Almost 90 per cent of those who marched against Article 23 said they were disappointed with the government's performance and felt that they needed to take to the streets so they could voice their discontent. Both Dr Chung and Professor Chan believe that the survey shows that the protesters knew exactly why they took to the streets and it was unlikely that they had been misled, as was suggested earlier by some people. The researchers also said Hong Kong people had already cast a vote of no confidence in Tung Chee-hwa as more than 80 per cent of the interviewees thought the chief executive should step down. According to another survey by the team carried out after the July 1 protest, 77 per cent of the public were opposed to passing the legislation on Wednesday. Only 10 per cent of the people backed the move. Meanwhile tycoon Henry Fok Ying-tung, a vice-chairman of the Chinese People's Political Consultative Conference - who skipped mention of his support for the law while delivering a public speech last Thursday - said last night that he backed the government's plan to press ahead with the vote. The legislation was an indispensable part in implementing the Basic Law, he said in an interview with Xinhua News Agency. The government has taken out advertisements in several newspapers today outlining the latest amendments. Another ad was placed by members of the public urging people to contact legislators to express their concerns.