Sugar is a commodity that is produced seasonally and sold annually, and its sales have its inherent laws. In China, the time of concentrated squeezing of sugarcane is from 10 to April of the following year. Due to the centralized listing of white sugar, the supply of white sugar is very sufficient in the short term. With the passage of time and continuous consumption, the inventory of white sugar is getting less and less. And the price often changes with it, which has seasonal characteristics.

Sugarcane has the characteristics of high temperature and strong light, high water demand and high fertilizer absorption in growing period, and it has special dependence on light, heat and water conditions that constitute climate resources. Drought, flood, strong wind, hail, low temperature frost and other weather have disastrous effects on the growth period of sugarcane, which will be long-term once formed. For example, frost occurred in the main sugarcane producing areas in China at the end of 1999/2000, which not only reduced the sugar yield by more than 2 million tons in the sugar-making period of 1999/2000, but also reduced the germination rate of ratoon sugarcane, which led to a change in the relationship between supply and demand and the price of sugar.

Besides paying attention to the climate and weather in China, we should also pay attention to the climate and weather changes in major sugar exporting countries. For example, Brazil's climate is influenced by marine climate, and global climate anomalies have a greater impact on Brazil, while sugarcane production is closely related to climate change. For example, in 2000, Brazil's sugar production also decreased by about 2 million tons.