China's Grain Trade Research Based on DEA model of National Food Security Perspective: Soybean as an Example

摘要

Food is a special commodity that is related to the national economy and people's livelihood and has strategic significance. It is an important factor in the national security strategy. Therefore, grain trade not only has the strategic characteristics of safeguarding national economic security, but also has the strategic characteristics of stabilizing national political security. At present, Chinese three main staples, rice, corn, and wheat are self-sufficient. However, Chinese soybean production has declined rapidly, and its external dependence has increased significantly. It is the most vulnerable part of the national food security strategy. This paper proposes the DEA model to analyze the soybean situation in China. The current situation of Chinese soybean production and supply can no longer guarantee the realization of the first specific goal of food security. Chinese soybeans are highly dependent on the international market, and China has no pricing power. Chinese soybean problem may bring a food crisis under the invisible control of big countries. In view of the new characteristics of Sino-US relations and the long-term nature of Sino-US competition and cooperation in the near future, it is necessary for China to examine the impact that soybeans may have on national food security. China needs to make an early plan to deal with the possible soybean crisis.