The feed formula structure of aquaculture in China is mainly corn and soybean meal. Soybean meal is a by-product of soybean pressing to produce edible oil. Because of its high protein content and amino acid composition close to the needs of animals, soybean meal is widely used in animal breeding all over the world.

China's feed soybean meal is mainly produced by squeezing imported soybeans, and about 780 kilograms of soybean meal can be produced per ton of soybeans. Domestic soybean crushing enterprises produce more than 70 million tons of soybean meal every year, and most of them enter feed production.

As far as soybean imports are concerned, China is one of the largest soybean importers in the world, with Brazil and the United States accounting for about 60% and 30% respectively.

According to the data comparison, China's annual soybean output is more than 20 million tons, while the overall demand is above 1 100 million tons, which shows that the demand exceeds supply and the import dependence is serious. According to customs data, in 20021year, China's import volume was 876710.5 million tons, and the import amount reached 48.276 billion yuan. It is worth noting that the overall import volume has not changed much, but the amount has increased greatly, indicating that the import price has increased greatly.