Photo taken on Aug. 8, 2008 in Macao of south China shows the commemorative stamps with the patterns of National Aquatics Center, known as the Water Cube, of the opening ceremony of the 2008 Beijing Olympic Games. A set of commemorative postcards, stamps and first-day covers of the 29th Olympic Games were issued in Macao to celebrate the upcoming event on Friday. [Xinhua Photo]

People show the commemorative postcards, stamps and first-day covers they just bought at the Liubukou Post Office in Beijing Aug. 8, 2008. The commemorative postcards, stamps and first-day covers of the opening ceremony of the Beijing 2008 Olympic Games were issued nationwide on Friday morning. [Xinhua Photo]