The original form of credit is

The initial form of credit is word-of-mouth credit established by people in commercial transactions, also known as "social credit".

In the early days of human history, commercial transactions were mainly completed through oral agreements, and buyers and sellers needed mutual trust to ensure the smooth progress of transactions. Therefore, the trust relationship between businessmen has gradually formed the concept of "social credit", that is, the reputation and credibility of businessmen. This form of credit is developed in the process of economic development and has been widely used. Lending, as a kind of credit behavior, is produced and developed on the basis of this social credit.

Nowadays, with the continuous development of technology and Internet, the credit evaluation system is becoming more and more perfect and diversified. In addition to the traditional financial credit rating, there are many new credit evaluation models, such as social network credit, personal credit, central bank credit and so on. These emerging credit evaluation methods combine big data, artificial intelligence and other technologies with credit evaluation, effectively improving the accuracy and efficiency of credit evaluation.