Historical Background - The issuance of the fourth set of RMB is closely linked to China's economic reforms in the 1980s, reflecting societal development and aesthetic trends [3] - The fourth set was introduced between 1987 and 1997 to meet the growing market demand, featuring multi-ethnic portraits to symbolize national unity [3] - Advanced anti-counterfeiting technologies were employed, including fluorescent and magnetic inks, enhancing the security of the currency [3] Production Process - The production of the same-numbered banknote collection retains the original printing techniques while enhancing artistic and preservation qualities through high-standard binding [6] - The fourth set of RMB was issued in phases from 1987 to 1997, with circulation lasting over 30 years until its withdrawal in 2018 [6] - Same-numbered banknotes are characterized by identical serial numbers across all denominations, making them extremely rare and valuable [6] Cultural Significance - The design of the fourth set of RMB incorporates rich cultural elements, making it a "national emblem" during the early reform period [9] - The banknotes feature intricate printing techniques, including hand-carved intaglio and dual-sided offset printing, enhancing their aesthetic and security [9] - The design reflects the spirit of the 1980s, balancing traditional heritage with a progressive outlook [12] Collectible Value - The rarity, completeness, and authority of the same-numbered banknote collection have made it highly sought after in the collectibles market [11] - The market performance of these collections has been robust, with certain rare combinations seeing significant price increases [13] - The withdrawal from circulation typically leads to a revaluation of the currency, with historical examples indicating strong appreciation potential [13] Conclusion - The same-numbered banknote collection of the fourth set of RMB represents not only a collection of currency but also a condensed historical narrative [15] - As the supply diminishes over time and demand continues to grow, the upward trend in value is anticipated, making it a wise choice for collectors [15]