The Huizi (), issued in the year 1160, was the official banknote of the Chinese Southern Song dynasty. It has the highest amount of issuance among various banknote types during the Song dynasty. Huizi notes came on three-colour printed paper and their usage was heavily promoted by the government of the Southern Song dynasty, the Huizi were backed by 280,000 guàn of copper cash coins. History The Huizi was originally introduced in the region of Liangzhe (兩浙) around what is present-day Zhejiang, and after 1160 Huizi notes were issued by the Ministry of Revenue (戶部) and their circulation was overseen by the Paper Notes Office (會子務). The earliest mentions of Huizi banknotes can be traced back to Shaanxi in 1075. In Hangzhou and the areas around it bianqian huizi (便錢會子) or "comfortable money" had become a common form of exchange during the beginning of the Southern Song dynasty. Besides the Jiaozi, Qianyin, and Guanzi the Huizi had become the most important form of paper currency during the Southern Song dynasty and was used for daily business transactions as well as for tax collecting and the usage of Huizi banknotes had also spread to the western and northern areas of the empire. Between the years of 1161 and 1166 the government of the Song dynasty had produced 28,000,000 dào (道, equal to a guàn or 1000 wén) in Huizi notes. During the reign of Emperor Xiaozong the usage of paper money came into question but as there was a shortage of copper cash coins they were assessed to be needed for the economy to be maintained as the amount of coins in circulation didn't sufficiently meet the markers demands, at this time there were Huizi banknotes with denominations as high as 4,900,000 guàn in daily circulation. In reaction to this Emperor Xiaozong regularly renewed the Huizi in circulation but not all expired Huizi notes were destroyed as they often kept circulated at lower values which caused the number of Huizi in circulation to rise. The Huizi notes were set to expire 3 years after their introduction and could be exchanged for their nominal value in copper cash coins, but in reality they were only produced every 9 years and 20,000,000 guàn in newly printed notes were added to the market, in 1195 this was raised to 30,000,000 guàn. As Huizi notes were easily forged the currency became deprecated to the point