Agricultural products refer to plants, animals and their products obtained in agricultural activities, including grains, oilseeds, cotton, sugar, coffee, etc. The production cycle of agricultural products is long, and it is greatly affected by natural conditions such as climate, season and other factors, and the price fluctuation is usually seasonal 12.Industrial goods refer to the goods used in industrial production, mainly including metals, energy, chemical products and so on. The production process of industrial goods depends more on technology and equipment and is less affected by natural conditions, but is more affected by the global economic cycle and industrial demand. Price fluctuations are more closely related to macroeconomic indicators such as GDP growth rate and industrial production index .