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FILE - In this June 23, 2011 file photo, activist artist Ai Weiwei opens the gate to talk to journalists gathered outside his home in Beijing. Representatives of Ai's design firm entered a closed hearing Thursday, July 14, 2011 to challenge a US$1.85 million tax bill delivered by authorities after the dissident was released from nearly three months' detention. (AP Photo/Ng Han Guan, File)

Artist Ai Weiwei's cool creations

China's most famous artist and outspoken dissident, Ai Weiwei, is featured in the 55th International Venice Biennale with selected works from his S.A.C.R.E.D. exhibition series.