The oil yardlong bean is a high-quality soft pod variant of the runner bean species that thrives in Northeast China and is uniquely found in this region, primarily in Heilongjiang and Jilin provinces.It is named for its abundant oil content and has a cultivation history spanning 500 years.The main part of the oil yardlong bean is the pod; after cooking, it becomes soft with few fibers, rich in bean fragrance, and high in protein content.
