Group 1 - The core value of the Fourth Set of Renminbi Same-Number Banknote Collection Album lies in its completeness of currency types and uniqueness of numbers, integrating various historical tickets to create a rich collection layer [1][5] - The collection includes all denominations of the Fourth Set of Renminbi, which was first issued in 1987, showcasing the cultural and historical significance of China's early reform and opening-up period [1][3] - The album features coins and tickets from the same era, such as food and cloth tickets, which vividly document China's transition from a planned economy to a market economy, adding depth to the social history [5][8] Group 2 - The design of the Fourth Set of Renminbi reflects a condensed cultural history, allowing collectors to understand the cultural logic behind the designs, which emphasize national unity and the spirit of the Chinese people [8][9] - The choice of scenic backgrounds on the banknotes symbolizes resilience, natural beauty, and the pursuit of excellence, collectively representing the spirit of the Chinese people during the reform period [8][9] - The advanced printing techniques used in the Fourth Set of Renminbi, such as intaglio printing and watermark technology, highlight the peak of China's banknote printing technology in the 1980s [9][11] Group 3 - The collection's value is driven by its rarity, uniqueness of numbers, and historical significance, with the 1980 versions of the 50 yuan and 100 yuan banknotes being particularly scarce [11][14] - As the Fourth Set of Renminbi gradually exits circulation and enters the collection market, the overall interest in collecting these notes continues to rise, making the same-number banknote collection album a "premium collection" [11][14] - In the coin collection market, the price of the Fourth Set of Renminbi Same-Number Banknote Collection Album fluctuates with market interest, with well-preserved albums potentially reaching thousands or even tens of thousands of yuan [14] Group 4 - The Fourth Set of Renminbi Same-Number Banknote Collection Album serves as a historical atlas of the early reform and opening-up period, reflecting the era's economic landscape and cultural choices [15]