It's not shit, it's shrimp yellow. There is a piece of black pulp wrapped in a thin shell in yellow, which is shit, and there is a black sand line on the back, which is shit. When making, grab the two pieces in the middle of the tail and draw backwards, and a black sand line will be drawn on the back. After washing all the excrement on your head, cut a piece from the tip of the shrimp head with scissors, and you can see the black pulp and pick it off. The advantage is to make shrimp cleaner. The disadvantage is that most of the shrimp yellow will be lost in the process of burning. Generally, in order not to let the yellow fall, the shit on the head is not cut. Although yellow is delicious, because the heavy metal residue in sewage is the most serious, try not to eat it.