A visitor experiences extracting the grain from the imperial grain-storing cask on display inside the Imperial Granary Museum of Ming Dynasty of Nanxingcang Barn, which has been opened to public visitors, in downtown of Beijing, Jan. 16, 2010. Affluent exhibits reenacting the history of grains transport through the Grand Canal and the imperial barns storage are accessible to visitors, who can also experience the quern of stone mill some 600 years ago. (Xinhua/Luo Wei)