Group 1 - The establishment of the People's Bank of China in 1948 aimed to unify the chaotic currency system in the country, which included various forms of currency and barter trade [3][5] - The first set of Renminbi was designed to symbolize the restoration of production and rebuilding of the nation, featuring images of trains, factories, and agricultural laborers [5][19] - The excessive printing of the first Renminbi led to severe inflation, undermining its credibility and failing to achieve its historical mission [5][7] Group 2 - The need for a new currency arose due to the inadequacies of the first Renminbi, which lacked durability and anti-counterfeiting measures, prompting a request for a new version [7][9] - The Soviet Union provided crucial support in the form of high-quality banknote paper and assistance in building printing facilities during the 1950s [9][11] - The second set of Renminbi faced challenges due to the deteriorating Sino-Soviet relations, leading to a push for self-sufficiency in currency production [11][14] Group 3 - The third set of Renminbi was developed as part of a strategic move towards independence in currency production, with preparations starting as early as 1955 [11][14] - Chinese experts successfully created their own printing machines, marking a significant step towards self-reliance in currency production [14][16] - The security measures surrounding the printing facilities are extremely stringent, reflecting the importance of currency sovereignty [16][17] Group 4 - China began printing currency for other countries as early as the 20th century, with notable contracts in the 21st century, showcasing its capabilities in international currency production [19][22] - The transition from "China Banknote Printing and Minting Corporation" to "China Banknote Printing and Minting Group Co., Ltd." signifies a major evolution in the company's scale and global engagement [24][26] - This transformation reflects the company's journey from a domestic supplier to a key player in the global currency market, enhancing its reputation and trustworthiness [24][26]