Photo taken on Dec. 20, 2007 shows a commemorative cover sheet depicting the National Stadium, or the Bird's Nest, in Beijing, China. A set of six stamps portraying Beijing's main Olympic venues were issued by China Post on Thursday. The stamps feature the National Gymnasium, the China Agricultural University Gymnasium, the Beijing University Gymnasium, the Qingdao Olympic Sailing Center, the Laoshan Velodrome and the National Swimming Center, or the Water Cube. A commemorative cover sheet was issued together with the stamps. 
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