The weight of pine nuts depends on the variety and size of pine nuts, but usually, the kernel of pine nuts accounts for about 40% of the total weight of pine nuts. Therefore, if there are 500 grams of whole pine nuts, the peeled pine nuts are about 200 grams (40% of 500 grams). Convert 200 grams into Jin (China Jin, 1 Jin =500 grams), which is about 0.4 Jin.