The issuing bank is the abbreviation of the issuing fund vault. The issuance fund refers to the printed RMB that has not been put into circulation (outside the currency circulation link). Central bank vaults can also be generally divided into business vaults and distribution vaults. However, at present, in the vaults of domestic central banks, except for some key vaults of the head office that keep issuing funds, gold reserves and foreign exchange reserves, other sub-vaults, central sub-vaults and sub-vaults all have the functions of issuing vaults and business vaults. The central bank's business library mainly refers to the provision for handling cash on hand, and there is generally no simple central bank business library in China. The issuing bank mainly has the functions of keeping the issuing funds (notes that have not yet been circulated), gold and silver objects, and articles designated for safekeeping (such as commemorative coins allocated in advance before the issuing date, counterfeit coins collected, etc.). ), handle the deposit and withdrawal business of commercial banks, allocate and issue funds, and manage the quality of cash deposited by relevant units.