The
Is a quality and monetary unit of the ancient ruler of East Asia, before the Tang Dynasty in China has emerged. A copper coin (square hole money) for a text, a thousand words with a rope from the middle of the hole to wear, known as the usual or a hanging. When used in China as a unit of quality, it is mainly to calculate the quality of money, less involved in other things, but after passing to Japan, in addition to monetary units and the calculation of monetary quality, but also for the calculation of the weight of the weights and measures (always equal to 100 two, About 3.75 kg, used to calculate the weight of the old, now more for the calculation of the weight of large quantities of goods, such as ice ice with ice), can also be used as a calculation of grip sushi quantifiers. Ming Hongwu years began to issue notes Da Mingbao notes, one of its face value is also called "consistent". The beginning is equivalent to a thousand text. But later due to devaluation, the lowest down to the value of a text or so. Historically, the purchasing power of coins was determined by the exchange rate of precious metals such as gold and silver, for example: ▪ According to the Northern Song Dynasty, the Northern Song Dynasty, the first year of the Northern Song Dynasty (1126) 1.5 Yue Ke's "Jin Tuo continued" set South Song Shaoxing four years, one two gold against 30, 1 two silver against 2.