After the Zhou Dynasty destroyed the Shang Dynasty, according to the Duke of Zhou, there were some people in the Yin people who led carts and oxen to serve the family and raised their parents with filial piety. These people are merchants engaged in long-distance trafficking trade.
In the capital of yin and other important cities, the nobles needed some precious items in their daily life, such as tortoise, shell, jade, jewelry, bronze, fur, tooth leather, silk and so on. In addition to making slaves produce by themselves, they had to come from other places. Some of them are contributed by different regions, and many of them are commodities exchanged. These commodities are mainly trafficked by some professional merchants, which promotes the development of Commerce.
