In February 2008, Spielberg withdrew from his position as advisor to the 2008 Summer Olympics. 2011) Circle of Animals/Zodiac Heads are sculptures of zodiac animals influenced by the water clock-fountain at the Old Summer Palace. In 2011, Ai served as co-director and curator of the 2011 Gwangju Design Biennale, and co-curator of the exhibition Shanshui at The Museum of Art Lucerne.