World's first set of gold and silver models of the "Bird's Nest", or the National Stadium, issued by China Gold Coin Incorporation show up at Beijing International Coins Exposition on Sunday Oct. 28. The exposition attracts nearly 150 national and international coin dealers. (Photo:Chinanews.cn)

World's first set of gold and silver models of the "Bird's Nest", or the National Stadium, issued by China Gold Coin Incorporation show up at Beijing International Coins Exposition on Sunday Oct. 28. The exposition attracts nearly 150 national and international coin dealers. (Photo:Chinanews.cn)