Liu Bolin blends into the vegetable section of a Beijing supermarket with help from two assistants, Nov 10, 2011. The 38-year-old artist stood for three hours hidden among the produce, to call for safe quality of vegetables. Liu graduated from the Sculpture Department of Central Academy of Fine Arts in China. [Photo/Asianewsphoto] 

Students take a test on the playground at Sihuang middle school in Wuhan, Central China's Hubei province, Nov 10, 2011. The purpose for moving the test outdoors is to prevent cheating, according to the school's principal. [Photo/CFP]