Unified receipts are different from what we usually call receipts (that is, we use single-column receipts at most, with specifications of 30 copies, which are divided into two copies, the first one is kept and the second one is given to customers). The unified receipt is a professional receipt issued under the supervision of the State Administration of Taxation in triplicate, that is, stub copy, receipt copy and bookkeeping copy. In accordance with the relevant requirements of the national tax authorities, the unified management methods of collection receipts and ordinary invoices are implemented together. In addition, the receipt copy needs to be stamped with the special invoice seal and the special financial seal, the bookkeeping copy is used for bookkeeping, and the stub copy is used for keeping tax returns.