A postal employee holds up a commemorative stamp featuring the National Stadium, known as the "Bird's Nest", in Beijing on Thursday, December 20, 2007. It is the first stamp in China in a pentagonal shape.  
 
Stamp collectors are at a Beijing post office to buy the newly issued commemorative stamps featuring some of the sports venues that will host the 2008 Olympics Games, on Thursday, December 20, 2007.

(Xinhua News Agency December 22, 2007)