Koi fish has been regarded as a symbol of wealth and status since ancient times, and there have been allusions since the Western Zhou Dynasty. According to textual research, his younger brother was sealed in Zheng Puyuan, and Zheng's descendants accompanied koi fish by the stream all the year round. Until the Northern Song Dynasty, the Zheng family had always been a scholar, and the officials were not bad. At this time, most of the carp in the stream are Dante. However, since Zheng Shanggong, there are few Zheng dignitaries in Puyuan, but the gentry and merchants here are extremely rich. Strangely, koi fish in Puyuanxi has gradually evolved from a pool of Dante into many gold bars. Until the 1980s, Puyuan people were famous for being good at business, and rich households emerged one after another. Therefore, the Zheng family in Puyuan admired koi fish, a geomantic thing handed down from generation to generation, and never sold it no matter how high someone paid.