The method for removing shrimp tail lines is as follows:

1. Use a paring knife to make a slit on the back of the shrimp. The length of the opening is about five millimeters. At this time, the shrimp meat can be peeled off, and a black or white intestine line will be exposed underneath, which is actually the stomach and colon of the shrimp's digestive system.

2. Use the tip of a knife to lift up the gut slightly. Pick it up with your index finger.

3. Use your fingers to gently pull out the gut. Try to pull it out as completely as possible so you don't end up with multiple sections of gut. Use a knife to remove the shrimp meat blocking the intestines. Discard the pulled gut.

4. Check the abdomen of the shrimp. Some shrimp larvae have a second gut string in their abdomen. If your shrimp has a second gut string, use a knife to make a slit along the belly. Use a knife and your fingers to pull out the gut.

5. Rinse fingers and shrimp. Gut is sticky, so make sure you rinse it well.

6. Keep shrimp refrigerated before cooking. Shrimp spoils quickly in warm air and needs to be kept refrigerated. Place the shrimp in the refrigerator or in a bowl of ice water. ?