An employee poses next to one of the gold-plated 'Zodiac Heads' by Chinese artist Ai WeiWei during a photocall in central London on February 9, 2015. The art work, valued at GBP 2m-3m (2,691,400 to 4,037,100 euros), will be auctioned in London on February 12, 2015. AFP PHOTO / BEN STANSALL

RESTRICTED TO EDITORIAL USE, MANDATORY MENTION OF THE ARTIST UPON PUBLICATION, TO ILLUSTRATE THE EVENT AS SPECIFIED IN THE CAPTION        (Photo credit should read BEN STANSALL/AFP/Getty Images)