Voucher, also known as special practice voucher for counting money, is a special kind of paper money designed for employees in banking and financial industries to simulate the production of real money.

Practice vouchers are mainly used in financial institutions, as an important tool for training and assessing employees' counting skills, and do not participate in social circulation. Its design imitates the basic characteristics of real banknotes, such as the size similar to RMB, and it is printed with obvious signs such as "practice tickets" and "sample tickets" to distinguish it from legal tender.

Training vouchers are not limited to RMB, but also have versions modeled after foreign exchange currencies such as US dollars, British pounds and Japanese yen. The pictures are rich and varied, covering places of interest, natural landscapes, modern buildings, portraits, animal patterns and various symbolic elements, which have certain artistic appreciation value.