The emergence of money originated in Shennong world. At the beginning, people regarded shells as evidence of exchangeable items. Later, with the development of feudal society, the types of currencies gradually increased. During the Qin Shihuang period, the currency was unified, and the circulating currency headed by gold and silver began to play a role in the long history. In ancient times, because the currency could not be unified for a long time, gold and silver were regarded as precious metals by various countries, and its rarity and material stability determined that it could become a common currency.

First, the characteristics of the common currency The metal and monetary properties of gold and silver themselves determine that they become a common currency. In the Qin dynasty, precious metals did not appear, only gold coins and copper coins were widely used. Gold has been the standard of measurement since BC, and China and the West have the same attitude towards gold. Because of its scarcity, people exchanged equivalent goods, especially in the later period, with the distribution of metallurgy and copper smelting, many currencies appeared in various countries. But gold is always the first currency in people's minds.

Second, the emergence of silver as a currency in history, it is usually your jewelry that uses silver. It was first used as currency in the Warring States Period. The large-scale use of silver coins in ancient times was after the Tang Dynasty. In Song Dynasty, a kind of waist-shaped silver coin, also called Yin Da, was specially made. It looks like an ingot, which is engraved with the names of place names, officials and craftsmen. After the Qing Dynasty, gold was gradually replaced by silver. With the development of casting technology, more and more silver is cast into silver dollars and appears in the world.

Third, the development of money Until today, gold and silver are still used as currencies in the international market. This is related to the value of these two currencies. Because of their scarcity, people feel more precious. It is an extremely important standard to measure the equivalence of goods with gold or silver. The development of gold and silver as circulating currency will continue to follow up, and history will not stop developing after all.