Ai Weiwei

Visitors looks at the installation called " Bang " by China's artist Ai Weiwei at the German pavilion during the 55th La Biennale of Venice

Stefano Rellandini/Reuters

Visitors looks at the installation called ‘Bang’ by Chinese artist Ai Weiwei at the German pavilion during the 55th La Biennale of Venice

Hong Kong Ai Weiwei

Kin Cheung/AP

Point of discussion: staff chat in front of the latest sculpture installation from Ai Weiwei, the Chinese dissident artist. His “Baby Formula” forms a map of China with cans of milk powder at an exhibition in Hong Kong. Mr Ai’s work was inspired by the scandal over melamine-tainted milk powder in China in 2008, which was reported to have affected nearly 300,000 children and caused six babies to die from kidney problems