Hypothesis and TheoryPublished 5 October 2026Moderate-scale operation of family farms in China: underlying logic, practical constraints, and optimization pathways for sustainable food systemsNing Ding · Jingjing Wang · Yong Xia · Fuhong Wang · Guirong Wang · Yi Lyu · Ziyang Wang · Yijuan YangFrontiers in Sustainable Food Systemsdoi 10.3389/fsufs.2026.1937247