6 million pieces. Picturesque includes five sets of stamps in special formats, including the Yangtze River, the Yellow River, the Great Wall, the scenic spots in Qian Shan and the bustling map of Suzhou, and is distributed with 6 million roses. The square space of stamps often reflects the history, science and technology, economy, culture, customs and natural features of a country or region, which makes stamps have collection value in addition to postal value.