1. Credit currency: a credit tool that can play a monetary role based on credit activities. The forms of credit currency mainly include commercial bills, bank bills and deposit currencies, and mainly exist in the form of bank bills, bills of exchange and checks. Credit money came into being in the 1930s. Due to the worldwide economic crisis, many countries were forced to break away from the gold standard and the silver standard, and the issued paper money could no longer be converted into metal money, so credit money came into being.

As a general medium of exchange, credit currency needs two conditions: first, people's confidence in this currency; The second is the legislative guarantee of currency issuance. Both are indispensable. At present, credit currency can be divided into the following forms: ① Secondary currency. Its function is to act as an intermediary in small or sporadic transactions, most of which are made of base metals. ② Cash or paper money. Its main function is also as a means to buy people's daily necessities, generally paper money with circulation means, and its distribution right is exclusive to the government or financial institutions.

2. Electronic money includes bank transaction tools and services, such as credit cards and electronic transfer terminals.

Electronic money refers to the stored value and prepaid payment mechanism in the retail payment mechanism, through the sales terminal, in the open network, between different electronic devices to pay. The so-called stored value refers to the value stored in a physical medium that can be used for payment, such as a smart card. This medium is also called e-wallet. When its stored value is used, it can be recovered from it by a specific device. Prepaid payment mechanism refers to a group of electronic data that can be transmitted and paid in a specific software or network, which is usually called digital cash. It usually consists of a set of binary data streams and digital signatures, and can be used directly on the network. Electronic money products are mainly used to replace currency in circulation.

It is the same as traditional currency in essence, function and function, and essentially acts as a special commodity with universal equivalent, with five functions: value scale, circulation means, payment means, storage means and world currency. In addition to these general properties of money, electronic money is an "invisible" money compared with money, which has many properties that many money does not have: electronic money is transmitted and displayed by electronic pulses instead of paper, processed and stored by microcomputer, and has no size, weight and imprint of traditional money; Money is generally monopolized by the central bank or specific institutions, while electronic money is currently jointly issued by the central bank and general financial institutions or even non-financial institutions. Traditional currency is legal tender guaranteed by the central bank and national credit, designed, managed and replaced by monetary authorities, and is strongly accepted and used. At present, electronic money is mostly developed and designed by different institutions, and its guarantee mainly depends on the developer's own reputation and assets, so its use can only be publicized and guided, not compulsory; In the use of electronic money, legal tender should be used to reflect and realize the value of goods and settle the relationship between creditor's rights and debts;