China's population is too large, and its own output simply can't meet the demand of rigid growth. The price increase in the second half of 2003 led to the strict macro-control measures taken by the China government in early 2004, which curbed the demand, and kept China at a high level (the government organized a soybean investigation group to buy soybeans in large quantities in the United States, and as a result, you went there, and it went up every day until you finished buying them), and the imported soybeans (which can extract soybean oil) fell sharply (soybeans depended on imports, foreign beans fell, and domestic soybeans also fell), which led to a negative soybean industry. There is also the immature development of the futures market (including the lack of hedging awareness of enterprises at that time). There is no rice or wheat. This problem can be seen from the national subsidy purchasing and storage policy. The government attaches great importance to these two crops. In addition, China suffered a big loss in the soybean industry a few years ago. After all, the government can still learn from it.