here is his concept:
"Fears for the safety of China’s most famous artist are growing amid international condemnation of his extralegal disappearance at the hands of the country’s increasingly repressive state security apparatus.
Family members of Ai Weiwei, whose “Sunflower Seeds” installation is currently on display in London’s Tate Modern gallery, said on Tuesday evening they still had no idea of his whereabouts after he was detained at Beijing airport on Sunday and led away by airport security.
Friends, family and associates have been warned not to speak to journalists and Mr Ai’s wife and eight employees were temporarily detained on Sunday after police raided his Beijing home and studio. Beijing police have refused to provide any information concerning his whereabouts.
Human rights groups and associates of Mr Ai say he is in grave danger of being tortured and is probably being deprived of medicines he needs to take regularly.
Britain, the US, Germany, France and the European Union all condemned Mr Ai’s disappearance and expressed concern at a wave of similar cases in recent weeks in which prominent human rights activists and internet bloggers have been detained or simply vanished"