Mainly refers to fish and carp, goldfish, etc. Since ancient hunting and gathering times, fish has a close relationship with human beings, and has even become one of the foods on which human beings depend. According to relevant documents, the idea of pond culture has existed in China since the end of Shang Dynasty. However, the systematic written record was first seen in a fish culture book by Fan Li in the Spring and Autumn Period. As early as ancient times, fish has become one of Ruiying. Historical Records of Zhou Benji contains the wealth of birds and fish in the Zhou Dynasty. In the process of preying on fish, people have also formed various customs related to fish. The Book of Songs Chenmen says: "If it eats fish, it will become a river. If he marries a wife, he will be the wife of Qi. If you eat fish, will you be a carp in the river? If you marry a wife, you are the son of Song. " Fish and carp in the Yellow River were used by Song Qi to describe women, and eating fish was associated with getting married. This is because fish is fertile and grows rapidly, which symbolizes the prosperity of the family and the large population.