Your primer to an issue in the news Who? Three Danish human rights activists - sculptor Jens Galschiot, creator of the Pillar of Shame, now on display at the University of Hong Kong, and his two sons - were barred from entering Hong Kong on Saturday. What? What were they planning to do in the city? The activists, from a group calling themselves the Colour Orange, had planned to display their 'orange message' - expressing concern about human rights violations on the mainland - during Friday's Hong Kong leg of the Olympic torch relay. When? When was Galschiot supposed to leave Hong Kong? He had planned to stay 11 days and help students and members of the Hong Kong Alliance in Support of Patriotic Democratic Movements in China repair the Pillar of Shame and paint it orange. Why? Why were the trio refused entry? An Immigration Department spokesman refused to comment on the case, but said it had a duty to 'uphold effective immigration controls'. Legislator Albert Ho Chun-yan, who made an emergency trip to the airport to try to broker entry for the men, quoted the department as saying it had never had any intention of allowing the three to enter Hong Kong. How? How have the critics reacted? Szeto Wah, chairman of the Alliance in Support of Patriotic Democratic Movements in China, said Hong Kong's image as an international free city had been affected. 'Will freedom of expression and demonstration for local people become the next target?' he asked. Mr Ho, who is also chairman of the Democratic Party, denounced the decision to deny the trio entry. '[Galschiot] is just an artist, everybody knows it. There's no reason to refuse him entry,' he said.