Shrimp line is on the back of shrimp, which is the digestive tract of shrimp. You need to remove the shrimp before cooking it.
If the shrimp is cooked, it is necessary to peel off the meat above the shrimp line when peeling the shrimp shell, and then pick out the exposed shrimp line with a toothpick. Shrimp is an arthropod living in water, belonging to arthropod crustaceans, which has high nutritional value for dietotherapy.