In exploring how expanding biofuel production in China affects land use and food security, a new economic model was built. It shows that growing bioethanol production for E10 gasoline can lead to changes like slight decreases in rice-growing land. Land competition among crops would be intense if not for using marginal land for biofuel crops. The study suggests that planting energy crops on less productive land could help increase biofuel sources without taking away too much food-growing space. Overall, the research indicates that using alternative land for energy crops can help ensure sustainable biofuel development in China.