Kuping silver is the standard monetary unit used by the national treasury in Qing dynasty, which began in Kangxi period. According to treaty of shimonoseki, one grain is equal to 575.82 mm, that is, 37.5438+008 grams of perfect silver (fineness is 93.5374%, that is, 998). 1908, the Ministry of Agriculture, Industry and Commerce and the Ministry of Commerce of the Qing Dynasty drew up a unified system of weights and measures, which stipulated that the grade of the warehouse was 37.438+0g.

Guanyin, also known as "Guan Ping Liang", "Guan Ping Yin" and "Guan Ping Liang", is a monetary accounting unit used by the customs in the middle and late Qing Dynasty and belongs to virtual silver. During the Qing Dynasty, China Customs levied import and export taxes, and there was no unified national standard. The fineness, weight and name of metallic silver actually circulating in various places were inconsistent, making it difficult to convert, which was inconvenient for Chinese and foreign businessmen. In order to unify the standards, Sima Ping used in foreign trade is also called Guangping, and one or two of them are taken as the standard units of Guan Ping and Liang Ping.

Kuping silver 37.30 1g, Guanyin 37.7495g (later evolved into 37.9 13g), Kuping silver can be exchanged for Guanyin.