Jiaozi first appeared in Sichuan. It appeared because the currency at that time was too heavy for long-distance transportation, so jiaozi came into being.

1, the development of commodity trade

Although the ancient society in China was a traditional small-scale peasant society, there was also the development of commercial trade, which actually started with the emergence of money. At first, this kind of trade only existed in a small scale, but when a very capable individual appeared in a society and set up an enterprise, it would have an effect similar to collectivization, which would make commercial and trade activities more prosperous, because when many people have the ability to run or start some industries, there must be an intersection between them, which would lead to the circulation of goods between industries, either in a small scale or in a long distance. If it is far away, there will be a problem under the social conditions at that time, because the currency at that time was too heavy, and most of it was made of iron and copper. If you want to carry out long-distance transportation, you need a lot of manpower and material resources to transport money. As a result, the development of commodity trade promoted the emergence of simple paper money. 2, the need of long-distance transportation

The emergence of this kind of paper money is mainly to realize the convenience of long-distance transportation. In long-distance transportation, a large number of copper coins or iron coins are difficult to carry, so if there is something light to replace at this time, then many people are willing to do it. So this currency appeared. The advantage of this currency is that it is very light and can carry a lot of money at a time. This is also a new currency evolved from the original currency in commodity trade. To sum up, this currency first appeared in Sichuan, which condensed the labor wisdom of businessmen. If there is anything that has prompted him, it must be the development of trade.