各种钱币都有其产生的历史背景和酝酿发展的过程。某种钱币从酝酿到退出流通的全过程称为钱币兴衰周期,它可划分为酝酿期、发生期、成熟期和衰退期。研究钱币兴衰周期除了对钱币本身变化的研究外,还必须研究它与当时的社会、政治、经济、文化等方面的相互关系,进而探索货币运动的规律。 All kinds of coins have their historical background and brewing development process. A coin from brewing to exit the circulation of the entire process known as the currency boom cycle, which can be divided into brewing period, occurrence, maturity and recession. In addition to the research on the change of money itself, it is also necessary to study its interrelation with the current social, political, economic and cultural aspects, and then explore the law of monetary movement.