As early as the Spring and Autumn Period and the Warring States Period, Yuncheng began to have a commercial transaction activity of "Japan and China are the city, praising the world's goods, retreating the transaction, and getting their own places". During the reign of Jin Wengong, Anyi was already a famous commercial market town. The earliest entrepreneur in China was Yidun, Linyi County, Yuncheng City. It can be said that China's commerce and trade industry began in Sanjin; The commerce of Sanjin is rooted in Yuncheng.

Yidun lived in the Warring States Period (now Yi Shi Town, Linyi County, Yuncheng City). When he was young, his family was poor. "The tiller is often hungry, and the mulberry is often cold." While he was struggling to find a way to revitalize his family business, it runs in the family's daughter, Fan Li, came to Daoism Village (now Taifan Village, Linyi County) to live in seclusion. As soon as he heard about it, he "asked for advice". Tao Zhugong told him, "If you want to get rich quickly, you should be an animal? (Son, four tones. Female livestock). "A listen to, suddenly enlighted. After careful planning, he took out all his savings, bought some small livestock and poultry at a low price and raised them carefully. A few years later, he was full of herds of pigs and sheep, mules and horses.

With the prosperity of animal husbandry, he bought and planned three animal husbandry areas on hundreds of miles of land around the ancient border for his three sons to operate separately. He carefully observed and analyzed the living habits of various livestock and poultry, and gradually explored and summarized the law of "full cows, full horses at night, and full sheep". He created the feeding methods of "drinking livestock with salt water" and "fighting rice to raise thousands of chickens" and the method of removing testicles for male animals, which greatly improved the feeding efficiency. He not only improved the quality of breeding stock by retaining the strong and eliminating the weak, but also bred offspring by mating local breeds with foreign breeds, which made great contributions to the improvement of livestock and poultry breeds. Up to today, Daniel and Gao Donkey in Yuncheng are still well-known, especially Daniel, which is regarded as one of the "five fine varieties" in China.

After the successful development of animal husbandry in Yidun, the masses were organized to use the hillside to open up nearly a thousand acres of apricot orchards, peach orchards and mulberry orchards. He cultivated more than 30 fresh apricot varieties, some of which are still famous today; There are more than 300 varieties of fresh peaches with different shapes, colors and tastes. Yidun not only planted mulberry gardens, but also opened a silk reeling factory called "Embroidery Garden". At that time, it belonged to Sangquan in the west, Yanchi in the east and Zhuan Xu in the south. A place to live soon became a big village.

After accumulating abundant capital by animal husbandry, Yidun turned his attention to a brand-new field that people had never set foot in at that time-making and selling salt. He invented the method of cultivating salt and drying salt, which greatly shortened the time of making salt and is still in use today. He also opened up two transportation routes, selling Yuncheng's "Luyan" to Qilu, Qinchuan, the Western Regions and even the Persian Gulf.

Yidun transported salt to the western regions, and shipped back batches of pearls, agates, jewels and jade articles from the western regions. More than 50 jewelry shops were opened along the way, and even extended to various vassal countries such as Qi, Lu, Yan and Chu, and eventually became a generation of jewelry giants. The management of jewelry not only made Yidun richer than the princes, but also made his appreciation of jewelry reach a very high level. Liu An's "Huainan Pan Zi Lun Xun" in the Han Dynasty praised: "Jade workers dazzle jade like blue, without losing their feelings." With the continuous expansion of foreign trade, people from all directions came to Xidi and Yidun for business transactions. The village where Yidun lived gradually developed from an animal husbandry area to a famous commercial market town. Later, Eaton established the first shopping center in the history of China, which was later called "Eaton City". The ruins of the ancient city wall are still there.

Yidun paid attention to giving full play to its own advantages and created a precedent for long-distance trafficking in the history of the Chinese nation; After he became rich, he practiced benevolence, kindness and charity. "Be anxious for the public and be righteous, benefit the country and the people", and respect the people for the officials. He summed up his business philosophy, business experience and business skills, and formed a collection of proverbs that has been passed down to this day. All these have had a great influence on later generations. Therefore, later generations respect it as the originator of commerce and trade. Yidun's business thought undoubtedly played an enlightening and foundation role in the development of Yuncheng, Shanxi and even the whole country.