Late Qing Dynasty and Republic of China. Ruichang foot silver, also known as "Ruichang Dade Ingot", was a kind of silver widely circulated in the late Qing Dynasty and the Republic of China. The casting of Ruichang foot silver began in the late Qing Dynasty and was cast by the silver furnace in Ruichang County, Jiangxi Province. This kind of silver was widely circulated during the Republic of China because of its high fineness and reliable quality. The weight and fineness of Ruichang foot silver are different from other silver, the weight is between 10 and 200, and the fineness is over 95%. The casting and spreading of Ruichang ancestral music was influenced by political, economic and cultural factors at that time. During the late Qing Dynasty and the Republic of China, due to the domestic economic depression, the price of silver fluctuated greatly. In order to stabilize the price of silver, the casting of Ruichang Zuyin was supported and recognized by the government. In addition, the casting of Ruichang Zuyin was also influenced by the silver furnace and merchants at that time. In order to protect their own interests, they cast this kind of high-quality silver.