AUTHOR=Wang Xiaonan , Lu Yi TITLE=Optimization of grain import market layout in the context of food security: a study of soybean in China JOURNAL=Frontiers in Sustainable Food Systems VOLUME=Volume 9 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2025.1549463 DOI=10.3389/fsufs.2025.1549463 ISSN=2571-581X