在吉林省梨树县三棵树村的“科技小院”试验田，中国农业大学在读博士沙野和同学们一起在地里忙碌着。他们打标记、量面积，把一块地细分出了多个试验区域。 In the experimental fields of the "Science and Technology Courtyard" in Sankeshu Village, Lishu County, Jilin Province, Sha Ye, a doctoral candidate at China Agricultural University, was busy in the fields together with his classmates. They put up markers and measured the areas, dividing a piece of land into multiple experimental sections.